Help Guide
Wireless Noise Canceling Stereo Headset
WH-CH730N/ WH-CH735N
Model: YY3006
Quick Start Guide
Find your fit
Wearing the headset
Download the app, and set up the headset
Many useful features are out there in your device. Download the “Sound Connect” app and get the most out of what you
have.
For the main features available with the “Sound Connect” app, see “Using the “Sound Connect” app”.
Let’s start to use
Turning on the headset
Press and hold the power button for about 2 seconds or more until the indicator flashes in blue and
the notification sounds. The headset turns on. The headset enters pairing mode automatically when
you turn on the headset for the first time after purchase.
The power button is located on the left unit.
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To prevent burning or malfunction due to getting wet
The headset is not waterproof.
If the headset is charged while it is wet with rain or sweat, this can result in burnout or malfunction.
Related information
Wearing the headset
Establishing a BLUETOOTH connection manually
Charging the headset
Establishing a BLUETOOTH® connection
Follow the downloaded “Sound Connect” app instructions.
Operating the headset
You can use the buttons on the right unit of the headset to perform the following operations.
: Play/next/previous button
Press once briefly while paused: Play
Press once briefly during playback: Pause
Press twice quickly: Skip to the beginning of the next track
Press 3 times quickly: Skip to the beginning of the previous track or the current track
There is a raised tactile bar on the button. This button is located in the center of the 3 series of
buttons.
＋：
Volume up button
Increase the volume
There is a tactile dot on the button.
－：
Volume down button
Lower the volume
This button is located opposite the volume up button in the 3 series of buttons. There is no tactile dot
on the button.
For more details on the operation procedure, refer to “Controlling the audio device (BLUETOOTH
connection)”.
What you can do with the headset
Using the headset
Using the “Sound Connect” app
Getting started
About the voice guidance
2
Supplied accessories
Included items
Parts and controls
Location and function of parts
About the indicator
Wearing the headset
Wearing the headset
Operating the headset
About the buttons on the headset
Power/Charging
Charging
Available operating time
Checking the remaining battery charge
Turning on the headset
Turning off the headset
Making connections
How to make a wireless connection to BLUETOOTH devices
Easy setup with app
Connecting with the “Sound Connect” app
Android™ smartphone
Pairing and connecting with an Android smartphone
Connecting to a paired Android smartphone
Connecting with an Android smartphone using LE Audio
iPhone (iOS devices)
Pairing and connecting with an iPhone
Connecting to a paired iPhone
Computers
Pairing and connecting with a computer (Windows® 11)
Pairing and connecting with a computer (Mac)
3
Connecting to a paired computer (Windows 11)
Connecting to a paired computer (Mac)
Other BLUETOOTH devices
Pairing and connecting with a BLUETOOTH device
Connecting to a paired BLUETOOTH device
Multipoint connection
Connecting the headset to 2 devices simultaneously (multipoint connection)
Switching audio between multiple devices with “audio switch”
Sharing music with “Auracast™ broadcast audio”
Disconnecting BLUETOOTH connection (after use)
Using the supplied headphone cable
Listening to music
Listening to music via a BLUETOOTH connection
Listening to music from a device via a BLUETOOTH connection
Controlling the audio device (BLUETOOTH connection)
About
360 Reality Audio
Enjoying seamless playback with speakers (Auto Switch)
Noise canceling function
What is noise canceling?
Using the noise canceling function
Listening to ambient sound
Listening to ambient sound during music playback (Ambient Sound Mode)
Making phone calls
Receiving a call
Making a call
Functions for a phone call
Making a video call on your computer
Using the voice assist function
Using Google Gemini
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Using Tencent Xiaowei
Using the voice assist function (Google™ app)
Using the voice assist function (Siri)
Important information
Precautions
Supported codecs
How to keep the software up-to-date (for comfortable use of the headset)
To prevent burning or malfunction due to getting wet
Licenses
Trademarks
Troubleshooting
Troubleshooting
Resetting the headset
Initializing the headset to restore factory settings
Specifications
Specifications
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Help Guide
Wireless Noise Canceling Stereo Headset
WH-CH730N/ WH-CH735N
Using the headset
The following functions can be operated using the buttons on the headset.
For functions with detailed operating procedures described in the Help Guide, refer to the Related Topic at the bottom of
the page.
BLUETOOTH connection
You can connect to devices such as a smartphone or computer via BLUETOOTH.
Playing music from a device via a BLUETOOTH connection
You can enjoy music wirelessly from BLUETOOTH-connected devices such as a smartphone or computer.
Making calls via a BLUETOOTH-connected device
You can make wireless calls using BLUETOOTH-connected devices such as a smartphone or computer.
Related Topic
How to make a wireless connection to BLUETOOTH devices
Connecting the headset to 2 devices simultaneously (multipoint connection)
Using the supplied headphone cable
Listening to music from a device via a BLUETOOTH connection
Controlling the audio device (BLUETOOTH connection)
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Help Guide
Wireless Noise Canceling Stereo Headset
WH-CH730N/ WH-CH735N
Using the “Sound Connect” app
Install the “Sound Connect” app on your smartphone from the Google Play store or App Store.
Service information linked with the features of the “Sound Connect” app
https://www.sony.net/supported-servicelink
sony.net/servicelink
The services that can be linked differ depending on the countries and regions.
The specifications of the services that can be linked are subject to change, suspension or termination without notice.
The following functions can be operated and set using the “Sound Connect” app.
For functions with detailed operating procedures described in the Help Guide, refer to the Related Topic at the bottom of
the page.
The following can be accessed from the [My Device] tab.
Headset controls and status display
Displaying the remaining battery charge (headset)
Ambient Sound Control
The modes of the noise canceling function and ambient sound function can be adjusted.
Adaptive Sound Control
The headset adjusts the noise canceling function automatically based on detected actions.
Listening mode
Sound settings can be switched based on the content or usage scenario.
Equalizer
Set sound quality from presets. You can also set sound quality customized to your preferences.
DSEE
It upscales compressed audio files to CD-quality sound for playback.
Max Volume Control
You can limit the volume of your headset. Set a maximum volume limit to enjoy music without the risk of unintentional
volume increases.
360 Reality Audio
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Set up the 360 Reality Audio.
BLUETOOTH Connection Quality
You can set whether to prioritize sound quality or connection stability when using Classic Audio via BLUETOOTH.
[Prioritize Sound Quality]: Prioritizes the sound quality.
[Prioritize Stable Connection]: Select this option when the connection is unstable, such as when frequent sound
interruptions occur.
When using BLUETOOTH connection with LE Audio, select [Low latency]. If [Low latency] is not displayed, set
[Headphone connection setting].
Note
The playback time may shorten depending on the sound quality and the conditions under which you are using the headset.
Depending on the ambient conditions in the area where you are using the headset, intermittent sound may still occur even if
[Prioritize Stable Connection] is selected.
Auto Switch (*)
You can enjoy wireless playback while having the audio output source automatically switched between the headset and
the speaker.
Change Quick Access services (*)
Set the service to be assigned to Quick Access.
Operation setting of the [NC/AMB] button
Set the switching pattern for the noise canceling and Ambient Sound Mode on the headset.
Voice Assistant (*)
Set up the Voice Assistant you want to use.
Battery Care
When enabled, it helps extend the battery lifespan to improve durability.
Automatic Power Off
If the headset remains unused for more than 15 minutes, it automatically turns off. Turning off this feature increases
power consumption.
Capture Voice During a Phone Call
The microphone activates to capture external sound, allowing you to hear your own voice more clearly during calls
(Sidetone function).
Notification & Voice Guide
Switch the notification sounds and voice guidance on or off. Set the language and volume for the voice guidance as well.
Software version
Display the headset software version.
Update Software
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Set how to update the headset software.
The following can be accessed from the [Discover] tab.
Listening History
It records and displays usage history, such as headset activity and the songs you have listened to, allowing you to review
your listening experience.
The following can be accessed from the [Menu] tab.
Help
Display support information for the headset.
Note
The operating instructions and screen displays of the “Sound Connect” app are subject to change without prior notice due to
future updates.
Related Topic
Connecting with an Android smartphone using LE Audio
About 360 Reality Audio
Enjoying seamless playback with speakers (Auto Switch)
Using the noise canceling function
Listening to ambient sound during music playback (Ambient Sound Mode)
Using Google Gemini
Using Tencent Xiaowei
Using the voice assist function (Google™ app)
Using the voice assist function (Siri)
How to keep the software up-to-date (for comfortable use of the headset)
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(*) Cannot be used during LE Audio connection.
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Help Guide
Wireless Noise Canceling Stereo Headset
WH-CH730N/ WH-CH735N
About the voice guidance
You will hear the following voice guidances depending on the operating procedure performed and the headset status.
In the factory settings, you will hear a voice guidance in English, Chinese, or Japanese via the headset.
You can change the language of the voice guidance and turn on or turn off the voice guidance using “Sound Connect”
app.
“Pairing”
When the headset enters pairing mode automatically:
The headset enters pairing mode automatically in the following cases.
When you pair the headset with a device for the first time after purchasing the headset
When there is no pairing information, such as after initialization, and you use the headset
When you manually set the headset to pairing mode
“Low battery”
When the remaining battery charge of the headset is low
“Battery is empty”
When automatically turning off due to low battery of the headset
“Battery about XX %” / “Battery fully charged”
When informing the remaining battery charge:
The “XX” value indicates the approximate remaining charge. This is a rough estimate.
“Voice guidance test”
When setting the voice guidance volume
“The Digital assistant is not connected” (*)
When Digital assistant is not available on the smartphone connected to the headset even if you operate the headset
“The Xiaowei is not connected” (*)
When Tencent Xiaowei is not available on the smartphone connected to the headset even if you operate the headset
“The Voice Assistant is not available. Please open the Sound Connect and check the Voice
Assistant settings.”
When operating Voice Assistant while connected in LE Audio
“Launch the Sound Connect to activate the Service Link.”
When Service Link is inactive and you try to use Quick Access
“App assigned to the Quick Access is not launched on the mobile device”
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When the corresponding app does not start even if the noise canceling/Ambient Sound Mode button is pressed when
Quick Access is set to the noise canceling/Ambient Sound Mode button
“The Quick Access is not available. Please open the Sound Connect and check the Quick
Access settings.”
When operating Quick Access while connected in LE Audio
“The Quick Access is not available. Please open the Sound Connect and check the Service
settings.”
When the usage conditions are not met during Quick Access use
Note
Changing the language of the voice guidance takes up to 10 minutes.
When you initialize the headset to restore to the factory settings after you change the language of the voice guidance, the
language will also return to the factory settings.
If the voice guidance is not heard, turn off the headset. Then, turn it back on again.
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(*) May not be supported in some countries and regions.
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Help Guide
Wireless Noise Canceling Stereo Headset
WH-CH730N/ WH-CH735N
Included items
After opening the package, check that all of the items in the list are included. If any items are missing, consult the Sony
support contact or your nearest Sony dealer.
Numbers in parentheses indicate the number of items.
Wireless Noise Canceling Stereo Headset (1)
USB Type-C® cable (USB-C® to USB-C®) (1) (Depending on the models, countries and regions)
Headphone cable (1)
Documents (1 set)
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Help Guide
Wireless Noise Canceling Stereo Headset
WH-CH730N/ WH-CH735N
Location and function of parts
Left unit
Headband1.
Headband sliders
Slide to adjust the length of the headband.
2.
Noise canceling function microphone
Picks up the sound of the noise when the noise canceling function is in use.
3.
Built-in antenna
A BLUETOOTH antenna is built into the headset.
4.
Tactile dot5.
Indicator (orange/blue)
Lights up in orange or blue to indicate the battery or communications status of the headset.
6.
Power/BLUETOOTH button
Turns the headset on or off.
: Power mark
: BLUETOOTH mark
7.
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Right unit
3 series of buttons: The volume up button, the play/call/next/previous button, and the volume down button.
USB Type-C port
Connects the headset to an AC outlet with a USB AC adaptor or to a computer with a USB Type-C cable to charge
the headset.
8.
L (left) mark9.
Call microphone
Picks up the sound of your voice when talking on the phone.
10.
Headphone cable input jack
Located next to the USB Type-C port.
Connect a music player or other device with the supplied headphone cable. Make sure that you insert the cable until
it clicks. If the plug is not connected correctly, you may not hear the sound properly.
11.
Headband1.
Headband sliders
Slide to adjust the length of the headband.
2.
Noise canceling function microphone
Picks up the sound of the noise when the noise canceling function is in use.
3.
Volume up button
There is a tactile dot on the button.
Increases the volume.
＋
: Plus mark
4.
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To check serial numbers, safety marks, etc.
Make sure the headset is turned off and the USB Type-C cable is not connected.
Pinch the inside of the right earpad and pull it to remove it.
The serial number and safety marks are located on the right unit.
Attach the removed earpad to the right unit.
Align the notches on the earpads with the steps indicated by the top and bottom arrows on the inside of the unit, and
insert the ear pads into the grooves.
Pay attention to the orientation of the R mark printed on the earpad.
Note
Do not remove the earpad unless necessary.
Before removing the earpad, make sure the headset is turned off and the USB Type-C cable is not connected.
Do not push into the interior or remove other internal parts. Doing so may damage the headset.
Do not remove earpad in the presence of iron sand or other metal objects. Iron sand or other metal objects may adhere to the
magnet inside the headset, causing the headset to malfunction.
Play/call/next/previous button
There is a raised tactile bar on the button. This button is located in the center of the 3 series of buttons.
Controls music playback on the BLUETOOTH device.
: Play/call/next/previous mark
5.
Volume down button
The button is located opposite the volume up button in the 3 series of buttons. There is no tactile dot on the button.
Lowers the volume.
–: Minus mark
6.
R (right) mark7.
Serial number
Located inside the unit.
See “To check serial numbers, safety marks, etc.” below.
8.
Noise canceling/Ambient Sound Mode button
The button is a separate button located next to the 3 series of buttons.
Switches the noise canceling function and Ambient Sound Mode.
NC/AMB: Noise canceling/Ambient Sound Mode mark
9.
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Be sure to attach the earpad in the correct direction. If the earpad is not attached in the correct direction, you may not get the
desired acoustic performance.
Any defects caused by failure to follow the above precautions are not covered by the product warranty.
Related Topic
About the indicator
Checking the remaining battery charge
About the buttons on the headset
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Help Guide
Wireless Noise Canceling Stereo Headset
WH-CH730N/ WH-CH735N
About the indicator
You can check various statuses of the headset by the indicator.
: Turns on in blue
: Turns on in orange
-: Turns off
Power status
The indicator flashes 2 times in blue.
When the headset is turned on
The indicator lights up in blue for about 2 seconds.
When turning off the headset
Indication of the remaining battery charge
The indicator repeatedly flashes slowly in orange for about 15 seconds.
When the remaining battery charge is 10% or lower
BLUETOOTH connection status
The indicator repeatedly flashes twice in blue.
When in pairing mode
The indicator repeatedly flashes in blue with an interval of about 1 second.
When the connection is not established
The indicator repeatedly flashes quickly in blue for about 5 seconds.
When the connection process is completed
The indicator repeatedly flashes in blue with an interval of about 5 seconds.
When the connection is established
The indicator repeatedly flashes quickly in blue.
When a call is incoming
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The unconnected and connected status indications automatically turn off after a period of time has passed. They start
flashing again for a period of time when an action is performed. When the remaining battery charge becomes low, the
indicator starts flashing in orange.
Other
The indicator repeatedly flashes in blue with an interval of about 5 seconds.
When the headset is turned on while the headphone cable is connected:
The indicator turns off automatically after a period of time has passed. When the remaining battery charge becomes
low, the indicator starts flashing in orange.
The indicator repeatedly flashes in orange and blue at an interval of about 0.6 seconds.
Updating software
The indicator flashes 4 times in blue.
When the initialization process is completed
Charging status
The indicator lights up in orange for about 1 minute, and then turns off.
When the battery is fully charged when charging starts on the headset
When battery care is enabled, and the remaining battery charge of the headset reaches 80% or more
The indicator lights up in orange.
When the headset is charging
The indicator turns off.
When the battery becomes fully charged and charging is complete
When battery care is enabled, and the remaining battery charge of the headset reaches 80% or more
The indicator repeatedly flashes twice in orange.
When the charging temperature of the headset is abnormal
When high temperature is detected near the USB Type-C port of the headset
For details, see “High temperature detection on the charging port” in “Charging”.
The indicator repeatedly flashes slowly in orange.
When an error occurs while the headset is charging and the headset is not charged
Related Topic
Charging
Checking the remaining battery charge
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Help Guide
Wireless Noise Canceling Stereo Headset
WH-CH730N/ WH-CH735N
Wearing the headset
Check the left and right units of the headset.
There is a tactile dot (A) on the left unit.
1
Extend the slider.
Extend the slider to its full length before putting on the headset.
2
Put on the headset.
Put on the headset with the earpads fitting snugly over your ears.
3
Adjust the length of the slider.
4
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Note
External force beyond the range of normal use, such as turning the unit's rotary axis or other moving parts to the opposite side of
the normal direction or dropping the headset, may cause damage. The warranty does not cover malfunctions caused by damage
due to improper handling.
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Adjust the slider to a length where the headband touches the top of your head.
Adjust the orientation of the units.
Adjust the orientation of the left and right units so that the earpads fit snugly all around your ears.
If you put on the headset without adjusting the slider, the headset may not be positioned properly on your head,
resulting in discomfort or a weak noise canceling effect.
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Help Guide
Wireless Noise Canceling Stereo Headset
WH-CH730N/ WH-CH735N
About the buttons on the headset
Use the buttons on the right unit of the headset for various operations, such as music playback, phone calls, or switching
to the Ambient Sound Mode.
Main operations
Play/call/next/previous button (A)
Press once briefly
During music playback: Plays or pauses music.
For a phone call: Receives a call when there is an incoming call. Finishes the call during a call.
Press twice quickly ( )
Skips to the beginning of the next track.
Press 3 times quickly ( )
Skips to the beginning of the previous track or the current track during playback.
Press twice quickly, holding the second press ( )
Fast-forwards the track. Release the button at the desired playback point.
Press 3 times quickly, holding the third press ( )
Fast-reverses the track. Release the button at the desired playback point.
Volume up button (B) and volume down button (C)
Adjust the volume.
Noise canceling/Ambient Sound Mode button (D)
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Press once briefly
Switches the noise canceling function and Ambient Sound Mode.
Press twice quickly
To use Quick Access (settings on the “Sound Connect” app are required)
Press 3 times quickly
To use Quick Access (settings on the “Sound Connect” app are required)
Related Topic
Using the “Sound Connect” app
Controlling the audio device (BLUETOOTH connection)
Receiving a call
Making a call
Functions for a phone call
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Help Guide
Wireless Noise Canceling Stereo Headset
WH-CH730N/ WH-CH735N
Charging
The headset contains a built-in lithium-ion rechargeable battery. Use the USB Type-C cable to charge the headset before
use.
About the charging time
The required time for fully charging the headset is about 3 hours (*).
High temperature detection on the charging port
If a high temperature is detected near the USB Type-C port of the headset, the indicator will repeatedly flash twice in
orange to notify you that an abnormality is detected.
Disconnect the charger, and make sure the USB Type-C port is clear of any foreign objects.
If there are water droplets on the charging port, dry the charging port completely.
If foreign objects are found in the charging port, carefully remove them with a tool such as an air duster while being
careful not to damage the port.
Once the charging port cools down, the indicator will turn off and you can resume charging.
Hint
For your safety, if you are using a C to C cable compatible with USB Type-C or a USB Type-C charging adaptors, charging will
automatically stop if a high temperature is detected.
Connect the headset to an AC outlet.
Use a USB Type-C cable and USB AC adaptor (A).
The indicator on the headset lights up in orange.
When charging is complete, the indicator turns off automatically.
After charging is complete, disconnect the USB Type-C cable.
1
(*) Time required for charging an empty battery to its full capacity. The charging time may differ depending on the conditions of use.
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System requirements for battery charge using USB
USB AC adaptor
A commercially available USB AC adaptor capable of supplying an output current of 0.5 A (500 mA) or more
USB cable
Commercially available USB Type-C cable (compliant with USB standards)
Computer
The computer equipped with a USB port as a standard
We do not guarantee that the operating procedures will work on all computers.
The operating procedures on a self-made computer are not guaranteed.
Usage hours
If the headset is not used for a long time, the battery usage hours may be temporarily reduced. Performance will
return to normal after several cycles of charging and use.
If you do not use your headset for several months, charge it at least once every 6 months to prevent battery
deterioration due to over-discharge.
If the usage hours of the battery decrease significantly, the rechargeable battery should be replaced. Consult your
nearest Sony dealer.
Hint
The headset can be also charged by connecting the headset to a running computer using the USB Type-C cable.
Note
If a USB Type-C cable is supplied, be sure to use it.
When charging is complete, remove the USB Type-C cable.
Charging may not be successful depending on the type of USB AC adaptor.
The headset cannot be charged when the computer goes into standby (sleep) or hibernation mode. In this case, change the
computer settings, and start charging once again.
If the headset is not used for a long time, it may take longer to charge the battery.
If the headset detects a problem while charging due to the following causes, the indicator (orange) flashes. In this case, charge
once again within the charging temperature range. If the problem persists, consult the Sony support contact or your nearest Sony
dealer.
Ambient temperature exceeds the charging temperature range of 5 °C to 35 °C (41 °F to 95 °F).
There is a problem with the rechargeable battery.
If the headset is not used for a long time, the indicator (orange) may not immediately light up when the headset starts charging.
Please wait a moment until the indicator lights up.
Avoid exposure to extreme temperature changes, direct sunlight, moisture, sand, dust, and electrical shock. Never leave the
headset in a parked vehicle.
When connecting the headset to a computer, make sure to connect it directly to the computer with a USB Type-C cable. Charging
will not be properly completed when the headset is connected through a USB hub.
Related Topic
About the indicator
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Help Guide
Wireless Noise Canceling Stereo Headset
WH-CH730N/ WH-CH735N
Available operating time
The available operating times of the headset with the battery fully charged are as follows:
BLUETOOTH connection
Music playback time
About 60 minutes of music playback is possible after 3 minutes charging. About 4.5 hours of music playback is
possible after 10 minutes charging as well.
Communication time
Headphone cable connected (power is turned on)
Hint
Codec Noise canceling function/Ambient Sound Mode Available operating time
AAC Noise canceling function: Active Maximum 50 hours
AAC Ambient Sound Mode: Active Maximum 50 hours
AAC Inactive Maximum 75 hours
SBC Noise canceling function: Active Maximum 50 hours
SBC Ambient Sound Mode: Active Maximum 50 hours
SBC Inactive Maximum 75 hours
LC3 Noise canceling function: Active Maximum 45 hours
LC3 Ambient Sound Mode: Active Maximum 45 hours
LC3 Inactive Maximum 70 hours
Noise canceling function/Ambient Sound Mode Available operating time
Noise canceling function: Active Maximum 35 hours
Ambient Sound Mode: Active Maximum 35 hours
Inactive Maximum 40 hours
Noise canceling function/Ambient Sound Mode Available operating time
Noise canceling function: Active Maximum 35 hours
Ambient Sound Mode: Active Maximum 35 hours
Inactive Maximum 40 hours
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By using the “Sound Connect” app, you can check which codec is used for a connection or switch the DSEE™ function.
Note
Usage hours may be different from the time described above depending on the settings for the headset functions and usage
conditions.
If you set the following functions, the available operating time of the battery becomes shorter than the ones described above.
Equalizer
DSEE
Service Link
Other changes to the default modes and functions made on the “Sound Connect” app
If you run the above settings at the same time, the available operating time of the battery becomes even shorter.
Related Topic
Using the “Sound Connect” app
Supported codecs
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Help Guide
Wireless Noise Canceling Stereo Headset
WH-CH730N/ WH-CH735N
Checking the remaining battery charge
You can check the remaining battery charge of the rechargeable battery in the following ways.
Check on your smartphone
When you are using an iPhone (iOS 13 or later)
When the headset is connected to an iPhone via an HFP (Hands-free Profile) BLUETOOTH connection, you can
check the remaining battery charge of the headset on an iPhone. For details, refer to the operating instructions
supplied with the iPhone.
The remaining charge which is displayed may differ from the actual remaining charge in some cases. This is a rough
estimate.
When you are using an Android smartphone (OS 8.1 or later)
When the headset is connected to an Android smartphone via an HFP BLUETOOTH connection, you can check the
remaining battery charge of the headset on the smartphone. For details, refer to the operating instructions supplied
with the Android smartphone.
The remaining charge which is displayed may differ from the actual remaining charge in some cases. This is a rough
estimate.
Check with the power button
When you press the power button (A) while the headset is on, a voice guidance indicating the remaining battery charge
can be heard.
“Battery about XX %” (The “XX” value indicates the approximate remaining charge.)
“Battery fully charged”
The remaining battery charge indicated by the voice guidance may differ from the actual remaining charge in some
cases. This is a rough estimate.
The indicator also flashes in orange for about 15 seconds if the remaining battery charge is 10% or lower when the
headset is turned on.
Check with the voice guidance notification
When the rechargeable battery becomes low, the voice guidance will play in the following cases.
When the headset is turned on
When using the headset
When the battery becomes completely empty, an alarm sounds. The voice guidance plays, then the headset
automatically turns off.
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Hint
You can also check the remaining battery charge of the headset with the “Sound Connect” app. Android smartphones and iPhone
both support this app.
Note
If the headset and smartphone are not connected with HFP, the remaining battery charge will not be correctly displayed.
If you connect the headset to an iPhone or Android smartphone with Media audio (A2DP) only in a multipoint connection, the
remaining battery charge will not be displayed correctly.
The remaining battery charge may not be properly displayed in the following situations. In that case, repeatedly charge and
discharge the battery multiple times. The remaining battery charge will then be properly displayed.
When using the headset for the first time after purchase
When the headset has not been used for a long period of time
Immediately after a software update
Related Topic
Using the “Sound Connect” app
About the indicator
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Help Guide
Wireless Noise Canceling Stereo Headset
WH-CH730N/ WH-CH735N
Turning off the headset
Hint
You can also turn off the headset with the “Sound Connect” app.
Related Topic
Turning on the headset
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Press and hold the power button (A) for about 2 seconds or more until the blue indicator turns off.
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Help Guide
Wireless Noise Canceling Stereo Headset
WH-CH730N/ WH-CH735N
How to make a wireless connection to BLUETOOTH devices
You can enjoy music and hands-free calling with the headset wirelessly by using your device’s BLUETOOTH function.
Pairing
To use the BLUETOOTH function, you must register both devices that will connect with each other in advance. This
process of registration is called “pairing”.
Pair the headset and the device manually.
Connecting to a paired device
Once a device is paired, it is not necessary to pair it again. Connect to devices already paired with the headset using the
methods necessary for each device.
For details on pairing or connection methods, refer to the following Related Topic.
Related Topic
Pairing and connecting with an Android smartphone
Pairing and connecting with an iPhone
Pairing and connecting with a computer (Windows® 11)
Pairing and connecting with a computer (Mac)
Pairing and connecting with a BLUETOOTH device
Connecting to a paired Android smartphone
Connecting to a paired iPhone
Connecting to a paired computer (Windows 11)
Connecting to a paired computer (Mac)
Connecting to a paired BLUETOOTH device
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Help Guide
Wireless Noise Canceling Stereo Headset
WH-CH730N/ WH-CH735N
Connecting with the “Sound Connect” app
Launch the “Sound Connect” app on your Android smartphone/iPhone to connect the headset to a smartphone or
iPhone.
Note
The connection between the headset and some smartphones or iPhones may become unstable when using the “Sound Connect”
app. In that case, follow the procedures in “Connecting to a paired Android smartphone”, or “Connecting to a paired iPhone” to
connect to the headset.
Related Topic
Using the “Sound Connect” app
Pairing and connecting with an Android smartphone
Pairing and connecting with an iPhone
Pairing and connecting with a computer (Windows® 11)
Pairing and connecting with a computer (Mac)
Connecting to a paired Android smartphone
Connecting to a paired iPhone
TP1002283818
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Help Guide
Wireless Noise Canceling Stereo Headset
WH-CH730N/ WH-CH735N
Pairing and connecting with an Android smartphone
The operating procedure to register the device that you wish to connect to is called “pairing”. First, pair a device to use it
with the headset for the first time.
Before starting the operating procedure, check the following.
The Android smartphone is placed within 1 m (3.2 ft) of the headset.
The headset is charged sufficiently.
The operating instructions for the Android smartphone are in hand.
Check the status of the headset.
The headset enters pairing mode automatically in the following cases. Proceed to step 2.
When you pair the headset with a device for the first time after purchasing the headset
After initializing the headset and clearing all pairing information
When you pair a second or subsequent device, if the headset already has pairing information for other devices,
enter pairing mode manually. Press and hold the power button (A) for about 5 seconds or more.
The indicator repeatedly flashes in blue twice in a row. You will hear the voice guidance say, “Pairing”.
0
:
00
1
35
Hint
The above operating procedure is an example. For more details, refer to the operating instructions supplied with the Android
smartphone.
To delete all BLUETOOTH pairing information, see “Initializing the headset to restore factory settings”.
Note
If pairing is not established within 5 minutes, pairing mode is canceled. In this case, turn off the power and start the operating
procedure again from step 1.
Once BLUETOOTH devices are paired, there is no need to pair them again, except in the following cases:
If pairing information is deleted, such as after a repair
Unlock the screen of the Android smartphone if it is locked.
2
On your Android smartphone screen, select the following items.
[Settings] - [Device connection] - [Bluetooth]
3
Touch the switch to turn on the BLUETOOTH function.
4
Touch [WH-CH730N series].
If Passkey (*) input is required, input “0000”.
The headset and smartphone are paired and connected with each other.
You will hear a notification sound indicating that the connection is established.
If they are not connected, see “Connecting to a paired Android smartphone”.
If [WH-CH730N series] does not appear on your Android smartphone screen, try again from step 3.
5
(*) A Passkey may be called “Passcode”, “PIN code”, “PIN number”, or “Password”.
36
When a 9th device is paired
The headset can be paired with up to 8 devices. If you pair a 9th device, the pairing information with the oldest connection date
and time will be overwritten with the information for the new device.
When the pairing information for the headset has been deleted from the connected BLUETOOTH device
When the headset is initialized
All of the pairing information will be deleted. In this case, delete the pairing information for the headset from the connected
device and then pair them again.
The headset can be paired with multiple devices, but can only play music from 1 paired device at a time.
Related Topic
How to make a wireless connection to BLUETOOTH devices
Connecting to a paired Android smartphone
Listening to music from a device via a BLUETOOTH connection
Disconnecting BLUETOOTH connection (after use)
Initializing the headset to restore factory settings
TP1002281765
5-075-047-11(1) Copyright 2026 Sony Corporation
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Help Guide
Wireless Noise Canceling Stereo Headset
WH-CH730N/ WH-CH735N
Connecting to a paired Android smartphone
Unlock the screen of the Android smartphone if it is locked.
1
Turn on the headset.
Press and hold the power button (A) for about 2 seconds or more.
You will hear a notification sound indicating that the headset is turned on.
The indicator continues to flash in blue even after you release your finger from the button.
If the headset has automatically connected to the last connected device, you will hear a notification sound indicating
that the connection is established.
Check the connection status on the Android smartphone. If it is not connected, proceed to step 3.
2
On your Android smartphone screen, select the following items.
[Settings] - [Device connection] - [Bluetooth]
3
Touch the switch to turn on the BLUETOOTH function.
4
38
Hint
The above operating procedure is an example. For more details, refer to the operating instructions supplied with the Android
smartphone.
Note
When connecting, [WH-CH730N series], [LE_WH-CH730N series], or both may be displayed on the connecting device. If both
are displayed, select [WH-CH730N series].
If the last-connected BLUETOOTH device is placed near the headset, the headset may connect automatically to the device by
simply turning on the headset. If this is the case, deactivate the BLUETOOTH function on the last-connected device or turn off the
power.
If you cannot connect your Android smartphone to the headset, delete the headset pairing information on your Android
smartphone. Then, pair them again. For the operating procedures on your Android smartphone, refer to the operating instructions
supplied with the Android smartphone.
Related Topic
How to make a wireless connection to BLUETOOTH devices
Pairing and connecting with an Android smartphone
Listening to music from a device via a BLUETOOTH connection
Disconnecting BLUETOOTH connection (after use)
Initializing the headset to restore factory settings
TP1002281766
5-075-047-11(1) Copyright 2026 Sony Corporation
Touch [WH-CH730N series].
You will hear a notification sound indicating that the connection is established.
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39
Help Guide
Wireless Noise Canceling Stereo Headset
WH-CH730N/ WH-CH735N
Connecting with an Android smartphone using LE Audio
When connection is established using LE Audio, you can enjoy music from an Android smartphone with less sound delay.
Set up with the “Sound Connect” app.
Devices supporting LE Audio
The Android smartphone must support LE Audio.
For the latest information on the compatible devices, refer to the support website.
About LE Audio
It supports the “LC3” codec.
When connected via LE Audio, certain headset features may not work. For details, see “Using the “Sound Connect”
app”.
Connect the headset to the Android smartphone via BLUETOOTH connection.
1
Launch the “Sound Connect” app and select the following items to switch the BLUETOOTH connection
method from Classic Audio to LE Audio.
[BLUETOOTH CONNECTION QUALITY] - [Low latency]
If [Low latency] is not displayed, select the following items.
[Headphone connection setting] - [LE Audio Priority]
2
Delete the pairing information for the headset on your Android smartphone.
3
Connect the headset to the Android smartphone via BLUETOOTH connection.
0
:
00
The indicator repeatedly flashes in blue twice in a row and the headset goes into pairing mode.
4
40
To finish LE Audio
Launch the “Sound Connect” app and change the settings.
The settings you can change depend on whether the item name following [BLUETOOTH CONNECTION QUALITY] is
displayed.
If [Low latency] is displayed, select the following items.
[BLUETOOTH CONNECTION QUALITY] - [Prioritize Sound Quality] / [Prioritize Stable Connection]
If [Low latency] is not displayed, select the following items.
[Headphone connection setting] - [Classic Audio only (conventional connection method)]
Hint
The above operating procedure is an example. For more details, refer to the operating instructions supplied with the Android
smartphone.
If the sound stutters or the connection is unstable, select [Prioritize Stable Connection] from [BLUETOOTH CONNECTION
QUALITY].
Related Topic
Using the “Sound Connect” app
Connecting with the “Sound Connect” app
Pairing and connecting with an Android smartphone
Initializing the headset to restore factory settings
TP1002295057
5-075-047-11(1) Copyright 2026 Sony Corporation
On your Android smartphone screen, select the following items to open the BLUETOOTH settings screen.
[Settings] - [Device connection]
5
Select [Pair new device].
6
Select [Available devices] - [WH-CH730N series].
The headset and smartphone are paired and connected with each other.
You will hear a notification sound indicating that the connection is established.
7
Touch the setting icon displayed next to the connected [WH-CH730N series].
8
Check that [LE Audio] is turned on.
If it is turned off, touch the switch to turn on [LE Audio].
9
On the “Sound Connect” app screen, check that [LE Audio] is displayed under the headset name.
10
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Help Guide
Wireless Noise Canceling Stereo Headset
WH-CH730N/ WH-CH735N
Pairing and connecting with an iPhone
The operating procedure to register the device that you wish to connect to is called “pairing”. First, pair a device to use it
with the headset for the first time.
Before starting the operating procedure, check the following.
The iPhone is placed within 1 m (3.2 ft) of the headset.
The headset is charged sufficiently.
The operating instructions for the iPhone are in hand.
Check the status of the headset.
The headset enters pairing mode automatically in the following cases. Proceed to step 2.
When you pair the headset with a device for the first time after purchasing the headset
After initializing the headset and clearing all pairing information
When you pair a second or subsequent device, if the headset already has pairing information for other devices,
enter pairing mode manually. Press and hold the power button (A) for about 5 seconds or more.
The indicator repeatedly flashes in blue twice in a row. You will hear the voice guidance say, “Pairing”.
0
:
00
1
42
Hint
The above operating procedure is an example. For more details, refer to the operating instructions supplied with the iPhone.
To delete all BLUETOOTH pairing information, see “Initializing the headset to restore factory settings”.
Note
If pairing is not established within 5 minutes, pairing mode is canceled. In this case, turn off the power and start the operating
procedure again from step 1.
Once BLUETOOTH devices are paired, there is no need to pair them again, except in the following cases:
If pairing information is deleted, such as after a repair
When a 9th device is paired
The headset can be paired with up to 8 devices. If you pair a 9th device, the pairing information with the oldest connection date
and time will be overwritten with the information for the new device.
When the pairing information for the headset has been deleted from the connected BLUETOOTH device
Unlock the screen of the iPhone if it is locked.
2
On your iPhone screen, go to [Settings] and touch [Bluetooth].
3
Touch the switch to turn on the BLUETOOTH function.
4
Touch [WH-CH730N series].
If Passkey (*) input is required, input “0000”.
The headset and iPhone are paired and connected with each other.
You will hear a notification sound indicating that the connection is established.
If they are not connected, see “Connecting to a paired iPhone”.
If [WH-CH730N series] does not appear on your iPhone screen, try again from step 3.
5
(*) A Passkey may be called “Passcode”, “PIN code”, “PIN number”, or “Password”.
43
When the headset is initialized
All of the pairing information will be deleted. In this case, delete the pairing information for the headset from the connected
device and then pair them again.
The headset can be paired with multiple devices, but can only play music from 1 paired device at a time.
Related Topic
How to make a wireless connection to BLUETOOTH devices
Connecting to a paired iPhone
Listening to music from a device via a BLUETOOTH connection
Disconnecting BLUETOOTH connection (after use)
Initializing the headset to restore factory settings
TP1002281821
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Help Guide
Wireless Noise Canceling Stereo Headset
WH-CH730N/ WH-CH735N
Connecting to a paired iPhone
Unlock the screen of the iPhone if it is locked.
1
Turn on the headset.
Press and hold the power button (A) for about 2 seconds or more.
You will hear a notification sound indicating that the headset is turned on.
The indicator continues to flash in blue even after you release your finger from the button.
If the headset has automatically connected to the last connected device, you will hear a notification sound indicating
that the connection is established.
Check the connection status on the iPhone. If it is not connected, proceed to step 3.
2
On your iPhone screen, go to [Settings] and touch [Bluetooth].
3
45
Hint
The above operating procedure is an example. For more details, refer to the operating instructions supplied with the iPhone.
Note
When connecting, [WH-CH730N series], [LE_WH-CH730N series], or both may be displayed on the connecting device. If both
are displayed, select [WH-CH730N series].
If the last-connected BLUETOOTH device is placed near the headset, the headset may connect automatically to the device by
simply turning on the headset. If this is the case, deactivate the BLUETOOTH function on the last-connected device or turn off the
power.
If you cannot connect your iPhone to the headset, delete the headset pairing information on your iPhone. Then, pair them again.
For the operating procedures on your iPhone, refer to the operating instructions supplied with the iPhone.
Related Topic
How to make a wireless connection to BLUETOOTH devices
Pairing and connecting with an iPhone
Listening to music from a device via a BLUETOOTH connection
Disconnecting BLUETOOTH connection (after use)
TP1002281740
5-075-047-11(1) Copyright 2026 Sony Corporation
Touch the switch to turn on the BLUETOOTH function.
4
Touch [WH-CH730N series].
You will hear a notification sound indicating that the connection is established.
5
46
Help Guide
Wireless Noise Canceling Stereo Headset
WH-CH730N/ WH-CH735N
Pairing and connecting with a computer (Windows® 11)
The operating procedure to register the device that you wish to connect to is called “pairing”. First, pair a device to use it
with the headset for the first time.
Before starting the operating procedure, check the following.
Your computer has a BLUETOOTH function that supports music playback connections (A2DP).
When you use a video calling application on your computer, your computer has a BLUETOOTH function that supports
calling connections (HFP/HSP).
The computer is placed within 1 m (3.2 ft) of the headset.
The headset is charged sufficiently.
The operating instructions for the computer are in hand.
Depending on the computer you are using, the built-in BLUETOOTH adaptor may need to be turned on. In the
following cases, refer to the operating instructions supplied with your computer.
You do not know how to turn on the BLUETOOTH adaptor.
You want to know if your computer has a built-in BLUETOOTH adaptor.
To use the Swift Pair function, click the following button, items, and switch in order to turn on the Swift Pair function.
[Start] button - [Settings] - [Bluetooth & devices] - [Show notifications to connect using Swift Pair]
Check the status of the headset.
The headset enters pairing mode automatically in the following cases. Proceed to step 2.
When you pair the headset with a device for the first time after purchasing the headset
After initializing the headset and clearing all pairing information
When you pair a second or subsequent device, if the headset already has pairing information for other devices,
enter pairing mode manually. Press and hold the power button (A) for about 5 seconds or more.
1
47
The indicator repeatedly flashes in blue twice in a row. You will hear the voice guidance say, “Pairing”.
0
:
00
Wake the computer up if the computer is in standby (sleep) or hibernation mode.
To use the Swift Pair function, proceed to step 3.
To connect without using the Swift Pair function, proceed to step 4 and continue to step 8.
2
Select [Connect] from the pop-up menu displayed on your computer screen.
The headset and computer are paired and connected with each other.
You will hear a notification sound indicating that the connection is established.
3
On your computer screen, click the [Start] button, then [Settings].
4
Click [Bluetooth & devices].
5
48
Click the [Bluetooth] switch to turn on the BLUETOOTH function. Click [Add device].
6
Click [Bluetooth].
7
Click [WH-CH730N series].
8
49
Hint
The above operating procedure is an example. For more details, refer to the operating instructions supplied with the computer.
To delete all BLUETOOTH pairing information, see “Initializing the headset to restore factory settings”.
Note
If pairing is not established within 5 minutes, pairing mode is canceled. In this case, turn off the power and start the operating
procedure again from step 1.
Once BLUETOOTH devices are paired, there is no need to pair them again, except in the following cases:
If pairing information is deleted, such as after a repair
When a 9th device is paired
The headset can be paired with up to 8 devices. If you pair a 9th device, the pairing information with the oldest connection date
and time will be overwritten with the information for the new device.
When the pairing information for the headset has been deleted from the connected BLUETOOTH device
When the headset is initialized
All of the pairing information will be deleted. In this case, delete the pairing information for the headset from the connected
device and then pair them again.
The headset can be paired with multiple devices, but can only play music from 1 paired device at a time.
Related Topic
How to make a wireless connection to BLUETOOTH devices
Connecting to a paired computer (Windows 11)
Listening to music from a device via a BLUETOOTH connection
Making a video call on your computer
Disconnecting BLUETOOTH connection (after use)
Initializing the headset to restore factory settings
TP1002291812
If Passkey (*) input is required, input “0000”.
The headset and computer are paired and connected with each other.
You will hear a notification sound indicating that the connection is established.
If they are not connected, see “Connecting to a paired computer (Windows 11)”.
If [WH-CH730N series] does not appear on your computer screen, try again from step 4.
(*) A Passkey may be called “Passcode”, “PIN code”, “PIN number”, or “Password”.
50
5-075-047-11(1) Copyright 2026 Sony Corporation
51
Help Guide
Wireless Noise Canceling Stereo Headset
WH-CH730N/ WH-CH735N
Pairing and connecting with a computer (Mac)
The operating procedure to register the device that you wish to connect to is called “pairing”. First, pair a device to use it
with the headset for the first time.
Compatible OS
macOS (version 12 or later)
Before starting the operating procedure, check the following.
Your computer has a BLUETOOTH function that supports music playback connections (A2DP).
When you use a video calling application on your computer, your computer has a BLUETOOTH function that supports
calling connections (HFP/HSP).
The computer is placed within 1 m (3.2 ft) of the headset.
The headset is charged sufficiently.
The operating instructions for the computer are in hand.
Depending on the computer you are using, the built-in BLUETOOTH adaptor may need to be turned on. In the
following cases, refer to the operating instructions supplied with your computer.
You do not know how to turn on the BLUETOOTH adaptor.
You want to know if your computer has a built-in BLUETOOTH adaptor.
Set the computer speaker to the ON mode.
If the computer speaker is turned off, no sound can be heard from the headset.
: the icon showing the speaker is off
The icon below shows the computer speaker is turned on.
Check the status of the headset.
The headset enters pairing mode automatically in the following cases. Proceed to step 2.
When you pair the headset with a device for the first time after purchasing the headset
After initializing the headset and clearing all pairing information
When you pair a second or subsequent device, if the headset already has pairing information for other devices,
enter pairing mode manually. Press and hold the power button (A) for about 5 seconds or more.
1
52
The indicator repeatedly flashes in blue twice in a row. You will hear the voice guidance say, “Pairing”.
0
:
00
Wake the computer up if the computer is in standby (sleep) or hibernation mode.
2
Select the following items from the Dock at the bottom of your computer screen.
[System Preferences] - [Bluetooth]
: the system preferences icon
3
Select [WH-CH730N series] on the [Bluetooth] screen and click [Connect].
4
53
Hint
The above operating procedure is an example. For more details, refer to the operating instructions supplied with the computer.
To delete all BLUETOOTH pairing information, see “Initializing the headset to restore factory settings”.
Note
If pairing is not established within 5 minutes, pairing mode is canceled. In this case, turn off the power and start the operating
procedure again from step 1.
Once BLUETOOTH devices are paired, there is no need to pair them again, except in the following cases:
If pairing information is deleted, such as after a repair
When a 9th device is paired
The headset can be paired with up to 8 devices. If you pair a 9th device, the pairing information with the oldest connection date
and time will be overwritten with the information for the new device.
When the pairing information for the headset has been deleted from the connected BLUETOOTH device
When the headset is initialized
All of the pairing information will be deleted. In this case, delete the pairing information for the headset from the connected
device and then pair them again.
The headset can be paired with multiple devices, but can only play music from 1 paired device at a time.
Related Topic
How to make a wireless connection to BLUETOOTH devices
Connecting to a paired computer (Mac)
Listening to music from a device via a BLUETOOTH connection
Making a video call on your computer
Disconnecting BLUETOOTH connection (after use)
Initializing the headset to restore factory settings
TP1002283817
5-075-047-11(1) Copyright 2026 Sony Corporation
If Passkey (*) input is required, input “0000”.
The headset and computer are paired and connected with each other.
You will hear a notification sound indicating that the connection is established.
If they are not connected, see “Connecting to a paired computer (Mac)”.
If [WH-CH730N series] does not appear on your computer screen, try again from step 3.
(*) A Passkey may be called “Passcode”, “PIN code”, “PIN number”, or “Password”.
54
Help Guide
Wireless Noise Canceling Stereo Headset
WH-CH730N/ WH-CH735N
Connecting to a paired computer (Windows 11)
Before starting the operating procedure, check the following.
Depending on the computer you are using, the built-in BLUETOOTH adaptor may need to be turned on. In the
following cases, refer to the operating instructions supplied with your computer.
You do not know how to turn on the BLUETOOTH adaptor.
You want to know if your computer has a built-in BLUETOOTH adaptor.
Wake the computer up if the computer is in standby (sleep) or hibernation mode.
1
Turn on the headset.
Press and hold the power button (A) for about 2 seconds or more.
You will hear a notification sound indicating that the headset is turned on.
The indicator continues to flash in blue even after you release your finger from the button.
If the headset has automatically connected to the last connected device, you will hear a notification sound indicating
that the connection is established.
Check the connection status on the computer. If it is not connected, proceed to step 3.
2
On your computer screen, right-click the speaker icon on the toolbar, then select [Sound settings].
3
55
On the [Sound] screen, select [WH-CH730N series] for [Output] and [Input].
The headset and computer are paired and connected with each other.
You will hear a notification sound indicating that the connection is established.
If [WH-CH730N series] is not displayed for [Output] and [Input], proceed to step 5.
4
Click [More sound settings].
5
On the [Playback] tab on the [Sound] screen, select [WH-CH730N series], right-click it, and select [Connect]
from the displayed menu.
6
56
Hint
The above operating procedure is an example. For more details, refer to the operating instructions supplied with the computer.
Note
If the music playback sound quality is poor, check that the A2DP function which supports music playback connections is enabled
in the computer settings. For more details, refer to the operating instructions supplied with the computer.
If the last-connected BLUETOOTH device is placed near the headset, the headset may connect automatically to the device by
simply turning on the headset. If this is the case, deactivate the BLUETOOTH function on the last-connected device or turn off the
power.
The connection is established.
You will hear a notification sound indicating that the connection is established.
On the [Recording] tab, select [WH-CH730N series], right-click it, and select [Connect] from the displayed
menu.
7
57
If you cannot connect your computer to the headset, delete the headset pairing information on your computer. Then, pair them
again. For the operating procedures on your computer, refer to the operating instructions supplied with the computer.
Related Topic
How to make a wireless connection to BLUETOOTH devices
Pairing and connecting with a computer (Windows® 11)
Listening to music from a device via a BLUETOOTH connection
Disconnecting BLUETOOTH connection (after use)
TP1002291811
5-075-047-11(1) Copyright 2026 Sony Corporation
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Help Guide
Wireless Noise Canceling Stereo Headset
WH-CH730N/ WH-CH735N
Connecting to a paired computer (Mac)
Compatible OS
macOS (version 12 or later)
Before starting the operating procedure, check the following.
Depending on the computer you are using, the built-in BLUETOOTH adaptor may need to be turned on. In the
following cases, refer to the operating instructions supplied with your computer.
You do not know how to turn on the BLUETOOTH adaptor.
You want to know if your computer has a built-in BLUETOOTH adaptor.
Set the computer speaker to the ON mode.
If the computer speaker is turned off, no sound can be heard from the headset.
: the icon showing the speaker is off
The icon below shows the computer speaker is turned on.
Wake the computer up if the computer is in standby (sleep) or hibernation mode.
1
Turn on the headset.
Press and hold the power button (A) for about 2 seconds or more.
You will hear a notification sound indicating that the headset is turned on.
The indicator continues to flash in blue even after you release your finger from the button.
2
59
Hint
The above operating procedure is an example. For more details, refer to the operating instructions supplied with the computer.
If the headset has automatically connected to the last connected device, you will hear a notification sound indicating
that the connection is established.
Check the connection status on the computer. If it is not connected, proceed to step 3.
Select the following items from the Dock at the bottom of your computer screen.
[System Preferences] - [Bluetooth]
: the system preferences icon
3
Click [WH-CH730N series] on the [Bluetooth] screen while pressing the computer Control button and select
[Connect] from the pop-up menu.
The connection is established. You will hear a notification sound indicating that the connection is established.
4
60
Note
If the music playback sound quality is poor, check that the A2DP function which supports music playback connections is enabled
in the computer settings. For more details, refer to the operating instructions supplied with the computer.
If the last-connected BLUETOOTH device is placed near the headset, the headset may connect automatically to the device by
simply turning on the headset. If this is the case, deactivate the BLUETOOTH function on the last-connected device or turn off the
power.
If you cannot connect your computer to the headset, delete the headset pairing information on your computer. Then, pair them
again. For the operating procedures on your computer, refer to the operating instructions supplied with the computer.
Related Topic
How to make a wireless connection to BLUETOOTH devices
Pairing and connecting with a computer (Mac)
Listening to music from a device via a BLUETOOTH connection
Disconnecting BLUETOOTH connection (after use)
TP1002283815
5-075-047-11(1) Copyright 2026 Sony Corporation
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Help Guide
Wireless Noise Canceling Stereo Headset
WH-CH730N/ WH-CH735N
Pairing and connecting with a BLUETOOTH device
The operating procedure to register the device that you wish to connect to is called “pairing”. First, pair a device to use it
with the headset for the first time.
Before starting the operating procedure, check the following.
The BLUETOOTH device is placed within 1 m (3.2 ft) of the headset.
The headset is charged sufficiently.
The operating instructions for the BLUETOOTH device are in hand.
Check the status of the headset.
The headset enters pairing mode automatically in the following cases. Proceed to step 2.
When you pair the headset with a device for the first time after purchasing the headset
After initializing the headset and clearing all pairing information
When you pair a second or subsequent device, if the headset already has pairing information for other devices,
enter pairing mode manually. Press and hold the power button (A) for about 5 seconds or more.
The indicator repeatedly flashes in blue twice in a row. You will hear the voice guidance say, “Pairing”.
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Hint
The above operating procedure is an example. For more details, refer to the operating instructions supplied with the
BLUETOOTH device.
To delete all BLUETOOTH pairing information, see “Initializing the headset to restore factory settings”.
Note
If pairing is not established within 5 minutes, pairing mode is canceled. In this case, turn off the power and start the operating
procedure again from step 1.
Once BLUETOOTH devices are paired, there is no need to pair them again, except in the following cases:
If pairing information is deleted, such as after a repair
When a 9th device is paired
The headset can be paired with up to 8 devices. If you pair a 9th device, the pairing information with the oldest connection date
and time will be overwritten with the information for the new device.
When the pairing information for the headset has been deleted from the connected BLUETOOTH device
When the headset is initialized
All of the pairing information will be deleted. In this case, delete the pairing information for the headset from the connected
device and then pair them again.
The headset can be paired with multiple devices, but can only play music from 1 paired device at a time.
Related Topic
How to make a wireless connection to BLUETOOTH devices
Connecting to a paired BLUETOOTH device
Listening to music from a device via a BLUETOOTH connection
Disconnecting BLUETOOTH connection (after use)
Initializing the headset to restore factory settings
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Perform the pairing procedure on the BLUETOOTH device to search for this headset.
[WH-CH730N series] will be displayed on the list of detected devices on the screen of the BLUETOOTH device.
If it is not displayed, repeat from step 1.
2
Select [WH-CH730N series] displayed on the screen of the BLUETOOTH device for pairing.
If Passkey (*) input is required, input “0000”.
3
(*) A Passkey may be called “Passcode”, “PIN code”, “PIN number”, or “Password”.
Make the BLUETOOTH connection from the BLUETOOTH device.
Some devices automatically connect with the headset when pairing is complete.
You will hear a notification sound indicating that the connection is established.
If they are not connected, see “Connecting to a paired BLUETOOTH device”.
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Connecting to a paired BLUETOOTH device
Hint
The above operating procedure is an example. For more details, refer to the operating instructions supplied with the
BLUETOOTH device.
Note
Turn on the headset.
Press and hold the power button (A) for about 2 seconds or more.
You will hear a notification sound indicating that the headset is turned on.
The indicator continues to flash in blue even after you release your finger from the button.
If the headset has automatically connected to the last connected device, you will hear a notification sound indicating
that the connection is established.
Check the connection status on the BLUETOOTH device. If it is not connected, proceed to step 2.
1
Make the BLUETOOTH connection from the BLUETOOTH device.
As for the operations on your BLUETOOTH device, refer to the operating instructions supplied with the
BLUETOOTH device.
When connected, you will hear a notification sound indicating that the connection is established.
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When connecting, [WH-CH730N series], [LE_WH-CH730N series], or both may be displayed on the connecting device. If both
are displayed, select [WH-CH730N series].
If the last-connected BLUETOOTH device is placed near the headset, the headset may connect automatically to the device by
simply turning on the headset. If this is the case, deactivate the BLUETOOTH function on the last-connected device or turn off the
power.
If you cannot connect your BLUETOOTH device to the headset, delete the headset pairing information on your BLUETOOTH
device. Then, pair them again. For the operating procedures on your BLUETOOTH device, refer to the operating instructions
supplied with the BLUETOOTH device.
Related Topic
How to make a wireless connection to BLUETOOTH devices
Pairing and connecting with a BLUETOOTH device
Listening to music from a device via a BLUETOOTH connection
Disconnecting BLUETOOTH connection (after use)
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Connecting the headset to 2 devices simultaneously (multipoint connection)
The headset can be simultaneously connected to 2 devices via BLUETOOTH connections, allowing you to perform the
following.
Waiting for an incoming call for 2 smartphones
You can listen to music played on one smartphone with the headset, wait for an incoming call for both smartphones,
and talk if an incoming call arrives.
Switching music playback between 2 devices
You can switch the music playback from one device to the other without performing a BLUETOOTH reconnection.
Connecting the headset to 2 devices simultaneously via BLUETOOTH connections
The following occurs when attempting to connect a paired third device to a headset via a BLUETOOTH connection while
2 devices are already connected via BLUETOOTH connections.
The BLUETOOTH connection with the device that was last playing music will be maintained.
The BLUETOOTH connection with the other device will be disconnected.
Then a BLUETOOTH connection between the third device and the headset is established.
Pair the headset with 2 devices, respectively.
1
Operate the first device to establish a BLUETOOTH connection with the headset.
2
Operate the second device to establish a BLUETOOTH connection with the headset.
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Music playback when the headset is connected to 2 devices via BLUETOOTH
connections
When playing music by operating the headset, the music is played from the device that played last.
If you start playback by operating the second device while playing music on the first device, the music of the second
device will be heard via the headset.
Talking on the phone when the headset is connected to 2 devices via BLUETOOTH
connections
When the headset is connected to 2 smartphones via BLUETOOTH connections simultaneously, both devices will be
in standby mode.
When an incoming call arrives to the first device, a ring tone is heard via the headset.
When an incoming call arrives to the second device while talking on the headset, a ring tone is heard overlapping the
call on the first device. In this case, you can use the headset to answer or reject the second call, but you cannot end
the first call.
If you want to end the first call, you will need to operate the connected device.
If the second call is received without finishing the first call, the first call will continue silently. When the second call is
finished, the call will return to the first call.
Note
If the connected device switches at an unintended time, you may be able to prevent the device from switching by turning off the
notification and operation sound on your smartphone or lowering the volume.
Related Topic
Using the “Sound Connect” app
How to make a wireless connection to BLUETOOTH devices
Supported codecs
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Switching audio between multiple devices with “audio switch”
The “audio switch” function is a Google feature that switches audio between Android devices.
Headsets that support “audio switch” can connect to multiple devices. When you use your headset on devices with “audio
switch” turned on, the audio heard from your headset seamlessly switches between devices. Your device notifies you
when the audio has switched devices.
Compatible smartphones
Android 8.0 or later
For details on “audio switch”, refer to the following URL.
https://support.google.com/android/?p=switch_audio
To use this function, you need to connect your headset and device via Google Fast Pair.
For details on Google Fast Pair, refer to the following URL.
https://support.google.com/android/answer/9417604
Note
The specifications of “audio switch” are subject to change without notice.
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Sharing music with “Auracast™ broadcast audio”
“Auracast™ broadcast audio” is a feature of LE Audio.
Headsets that support “Auracast™ broadcast audio” allow you to enjoy the same music simultaneously on multiple
headsets from a single smartphone.
Note
A connected device that supports “Auracast™ broadcast audio” is required.
For details, refer to the operating instructions supplied with the connected device.
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Disconnecting BLUETOOTH connection (after use)
Hint
When you finish playing music, the BLUETOOTH connection may terminate automatically depending on the BLUETOOTH
device.
Related Topic
Turning off the headset
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Disconnect the BLUETOOTH connection by operating the BLUETOOTH device.
You will hear a notification sound.
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Turn off the headset.
You will hear a notification sound.
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Using the supplied headphone cable
You can use the headset as noise canceling headphones while the headset is connected to a device via the supplied
headphone cable and the headset is turned on.
Hint
You can listen to music even if the headset is turned off. In this case, the noise canceling function cannot be used.
To use the noise canceling function/Ambient Sound Mode, turn the headset on.
The headset turns off automatically if you disconnect the supplied headphone cable from the headset while it is turned on.
When an incoming call arrives, a ring tone is heard via the headset. Answer the call using your smartphone, and talk using the
microphone of the phone. You can hear the caller’s voice from the headset. If you disconnect the headphone cable from the
smartphone, you can talk using the microphone and speaker of the phone.
Note
Use the supplied headphone cable only.
When plugging or unplugging the cable, hold the plug and plug it straight into the headphone cable input jack. Pulling on the cable
or applying excessive force may cause it to break.
Make sure the plug is fully inserted. If the plug is not fully inserted, sound may not be heard.
When using the headphone cable, the BLUETOOTH function cannot be used.
The volume up/volume down button and play/call/next/previous button cannot be used. Perform operating procedures, such as
adjusting the volume and play/pause, on the playback device.
Related Topic
Using the noise canceling function
Connect a playback device to the headphone cable input jack with the supplied headphone cable.
Be sure to connect the L-shaped plug into the connecting device.
1
Turn on the headset.
You will hear a notification sound indicating that the headset is turned on.
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Listening to music from a device via a BLUETOOTH connection
If your BLUETOOTH device supports the following profiles, you can enjoy listening to music and control the device from
your headset via a BLUETOOTH connection.
A2DP (Advanced Audio Distribution Profile)
You can enjoy high-quality music wirelessly.
AVRCP (Audio Video Remote Control Profile)
You can adjust the volume and other settings.
The operation may vary depending on the BLUETOOTH device. Refer to the operating instructions supplied with the
BLUETOOTH device.
Hint
The headset supports SCMS-T content protection. You can enjoy music and other audio on the headset from a device such as a
portable TV that supports SCMS-T content protection.
Depending on the BLUETOOTH device, it may be necessary to adjust the volume or set the audio output setting on the device.
The headset volume during a call and during music playback can be independently adjusted. Even if you change the volume
during music playback, the volume of a call does not change.
Note
Connect the headset to a BLUETOOTH device.
1
Put the headset on your ears.
See “Wearing the headset” for how to put the headset on your ears.
2
Operate the BLUETOOTH device to start playback and adjust the volume to a moderate level.
3
Adjust the volume by pressing the volume up/volume down buttons of the headset.
There is a tactile dot (A) on the + button.
When the volume reaches the maximum or minimum, an alarm sounds.
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If the communication condition is poor, the BLUETOOTH device may malfunction in response to the operating procedure on the
headset.
Related Topic
How to make a wireless connection to BLUETOOTH devices
Controlling the audio device (BLUETOOTH connection)
Using the noise canceling function
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Controlling the audio device (BLUETOOTH connection)
If your BLUETOOTH device supports the AVRCP profile’s operating function, the following operating procedures are
available. The available functions may vary depending on the BLUETOOTH device, so refer to the operating instructions
supplied with the device.
You can use the play/next/previous button (A) to perform the following.
To play:
Press once briefly while paused.
To pause:
Press once briefly during playback.
To skip to the beginning of the next track:
Press twice quickly. ( )
To skip to the beginning of the previous track or the current track during playback:
Press 3 times quickly. ( )
To fast-forward:
Press twice quickly, holding the second press. Release the button at the desired playback point. ( )
To fast-reverse:
Press 3 times quickly, holding the third press. Release the button at the desired playback point. ( )
You can use the volume up button (B) and volume down button (C) to perform the following.
Adjust the volume.
Note
If the communication condition is poor, the BLUETOOTH device may malfunction in response to the operating procedure on the
headset.
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The available functions may vary depending on the connected device, the music software, or app used. In some cases, the
device may function differently or may not work even if the above operating procedures described are performed.
When you use an iPhone, Siri may be activated by pressing and holding the (play/next/previous) button.
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About 360 Reality Audio
360 Reality Audio is a new music experience using Sony’s 360 three-dimensional audio technology.
Positional information is attached to each sound source such as vocals, chorus, and musical instruments, and are placed
in a spherical space.
Listeners can experience a three-dimensional sound field as if they are immersed in a live performance of the artists.
Conditions of use
Download and use a music streaming service app that supports 360 Reality Audio on your smartphone or tablet
equipped with iOS or Android. The app may require a fee.
By optimizing the sound field and the acoustic feature of headset with the “Sound Connect” app, you can enjoy a more
realistic sense of reality.
For details on 360 Reality Audio, refer to the following URL.
https://www.sony.net/360RA/
Note
Service is not available in certain countries and regions.
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Enjoying seamless playback with speakers (Auto Switch)
You can enjoy wireless playback while having the audio output source automatically switched between the headset and
the speaker without operating the headset or the speaker.
The Auto Switch function requires both the headset and speaker to be compatible with devices that support Auto Switch.
Set up with the “Sound Connect” app.
For details on the Auto Switch compatible devices, refer to the following URL.
https://www.sony.net/asw_comp_hp
Before using Auto Switch, make sure of the following:
Install the “Sound Connect” app on your smartphone.
Update the software of the speaker and headset to the latest version.
To adjust the volume
Adjust the volume on the headset or speaker during playback. Even if you change the volume, the volume setting on
your headset or speaker that is not playing music will not be affected.
To disable Auto Switch
Cancel the link on the “Sound Connect” app. Initializing the headset or the linked speaker cancels the link as well.
Hint
If you do not want to automatically switch the audio output source while the speaker linkage is enabled, pause music playback on
the smartphone beforehand.
Pair the Auto Switch compatible speaker with your smartphone that has the “Sound Connect” app installed.
If already paired, connect the speaker to your smartphone.
1
Check that the BLUETOOTH standby function of the speaker is enabled in the “Sound Connect” app.
2
Turn off the speaker.
3
Connect the headset to your smartphone and follow the on-screen instructions from Auto Switch to enable
the linkage with the speaker.
4
Start playing music on your smartphone.
Start playing music on the smartphone on which the “Sound Connect” app is installed and the Auto Switch settings
are specified.
When you turn off the headset while music playback from the headset is in progress, the audio output source for
music playback is automatically switched to the speaker.
If the audio output source is not switched as expected, try bringing the speaker and the headset closer to each
other.
When you turn on the headset while music playback from the speaker is in progress, the audio output source for
music playback is automatically switched to the headset.
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Note
Auto Switch does not work for the hands-free function of the connected smartphone.
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What is noise canceling?
The noise canceling function generates antiphase sound against surrounding noises such as sounds from vehicles or air
conditioners indoors. It reduces the surrounding noises by canceling them out.
Note
Depending on the type of noise or if it is used in a very quiet environment, you may not feel the noise canceling effects, or you
may feel that some noise is increased.
When you are wearing the headset, depending on how you wear the headset, the noise canceling effects may be decreased or a
beeping sound (feedback) may be heard. In this case, take off the headset and put it on again.
The noise canceling function works primarily on noise in the low frequency band such as vehicles and air conditioning. While
noise is reduced, it is not completely canceled.
When you use the headset in a car or a bus, noise may occur depending on street conditions.
Smartphones may cause interference and noise. Should this occur, move the headset further away from the smartphone.
Do not cover the microphones (A) on the left and right units of the headset with your hands or other objects. The effect of the
noise canceling function or Ambient Sound Mode may not work properly or a beeping sound (feedback) may occur. If any of this
is the case, remove your hands or other objects from the left and right microphones.
For details on how to use the noise canceling function, refer to the following Related Topic.
Related Topic
Using the noise canceling function
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Using the noise canceling function
If you use the noise canceling function, you can enjoy music without being disturbed by ambient noise.
Check the notification sound
It may not play on any browsers except the latest ones.
When Ambient Sound Mode is enabled
When the noise canceling function is enabled
About the instruction manual video
Turn on the headset.
You will hear a notification sound indicating that the headset is turned on.
When you are using the headset for the first time after purchase or just after initializing the headset, the noise
canceling function is activated automatically when you turn on the headset. Any changes made to the settings are
retained from this point on.
1
Press the noise canceling/Ambient Sound Mode button (A) to change the settings of the noise canceling
function.
Each time the button is pressed, the function switches as follows.
Ambient Sound Mode is enabled and the noise canceling function is disabled.
You will hear a notification sound.
The noise canceling function is enabled and Ambient Sound Mode is disabled.
You will hear a notification sound.
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Watch the video for how to use the noise canceling function. No audio explanation is available.
Models for countries and regions excluding Chinese mainland and Japan:
https://rd1.sony.net/help/mdr/mov0111/h_zz/
Models for Chinese mainland:
https://rd1.sony.net/help/mdr/mov0111/zh-cn/
Models for Japan:
https://rd1.sony.net/help/mdr/mov0111/ja/
Hint
If you connect the supplied headphone cable while using the noise canceling function with a BLUETOOTH connection, the
BLUETOOTH function is turned off. You can continue to use the noise canceling function.
You can also change the settings of the noise canceling function and Ambient Sound Mode with the “Sound Connect” app.
You can select one of the following on the “Sound Connect” app to set how you want the functions to change when you press the
noise canceling/Ambient Sound Mode button.
Noise canceling function enabled
Ambient Sound Mode enabled
Noise canceling function and Ambient Sound Mode disabled
Related Topic
Using the “Sound Connect” app
About the voice guidance
Turning on the headset
What is noise canceling?
Listening to ambient sound during music playback (Ambient Sound Mode)
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Listening to ambient sound during music playback (Ambient Sound Mode)
The microphones built into the left and right headset units make it easier to hear ambient sound. You can hear ambient
sound while enjoying music.
Check the notification sound
It may not play on any browsers except the latest ones.
When the noise canceling function is enabled
When Ambient Sound Mode is enabled
About the instruction manual video
Turn on the headset.
You will hear a notification sound indicating that the headset is turned on.
When you are using the headset for the first time after purchase or just after initializing the headset, the noise
canceling function is activated automatically when you turn on the headset. Any changes made to the settings are
retained from this point on.
1
Press the noise canceling/Ambient Sound Mode button (A) to switch to the Ambient Sound Mode.
Each time the button is pressed, the function switches as follows.
The noise canceling function is enabled and Ambient Sound Mode is disabled.
You will hear a notification sound.
Ambient Sound Mode is enabled and the noise canceling function is disabled.
You will hear a notification sound.
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Watch the video for how to use Ambient Sound Mode. No audio explanation is available.
Models for countries and regions excluding Chinese mainland and Japan:
https://rd1.sony.net/help/mdr/mov0111/h_zz/
Models for Chinese mainland:
https://rd1.sony.net/help/mdr/mov0111/zh-cn/
Models for Japan:
https://rd1.sony.net/help/mdr/mov0111/ja/
Hint
Ambient Sound Mode settings changed with the “Sound Connect” app are stored in the headset. You can enjoy music with the
stored settings by enabling Ambient Sound Mode even when the headset is connected to other devices which do not have the
“Sound Connect” app installed.
You can select one of the following on the “Sound Connect” app to set how you want the functions to change when you press the
noise canceling/Ambient Sound Mode button.
Noise canceling function enabled
Ambient Sound Mode enabled
Noise canceling function and Ambient Sound Mode disabled
Note
Depending on the ambient conditions and the type and volume of audio playback, ambient sounds may not be heard even when
using Ambient Sound Mode. Do not use the headset in places where it would be dangerous if you are unable to hear ambient
sounds, such as on a road with car and bicycle traffic.
If the headset is not being worn properly on your ears, the Ambient Sound Mode may not work correctly. Wear the headset
properly.
Depending on the surrounding environment, wind noise may increase when the Ambient Sound Mode is turned on. In that case,
change Ambient Sound Mode settings from Normal mode to Voice mode using the “Sound Connect” app. If the wind noise is still
significant, turn off Ambient Sound Mode.
When Ambient Sound Mode is activated, if your fingers or hair touch the noise canceling function microphones, you may hear a
loud sound.
Related Topic
Using the “Sound Connect” app
About the voice guidance
Using the noise canceling function
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Receiving a call
You can talk on the phone hands-free via a BLUETOOTH connection on a smartphone that supports the following
BLUETOOTH profiles.
HFP : Hands-free Profile
HSP : Headset Profile
If your smartphone supports both HFP and HSP, set it to HFP.
The operating procedure may vary depending on the smartphone. Refer to the operating instructions supplied with
the smartphone.
Depending on the connected device or the application, the functions may not work properly even if you try to operate
them with the headset.
Ring tone
When an incoming call arrives, a ring tone will be heard from the headset, and the indicator flashes quickly in blue.
You will hear either of following ring tones, depending on your smartphone.
Ring tone set on the headset
Ring tone set on the smartphone
Ring tone only for a BLUETOOTH connection set on the smartphone
Connect the headset to a smartphone via a BLUETOOTH connection beforehand.
1
When you hear the ring tone, press the call button (A) on the headset and receive the call.
When you receive an incoming call during music playback, playback pauses and a ring tone will be heard from the
headset.
You can talk using the microphone (B) on the left unit.
If no ring tone is heard via the headset
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Hint
When receiving a call by using a smartphone, some smartphones may receive a call on the phone instead of the headset. With
an HFP or HSP connection, switch the call to the headset by using your smartphone.
The volume for a call can be adjusted during a telephone conversation only.
The headset volume during a call and during music playback can be independently adjusted. Even if you change the volume
during a call, the volume of music playback does not change.
Note
Depending on the connected device or playback application you are using, when you receive an incoming call during music
playback, playback may not resume automatically even after you finish the call.
Use a smartphone at least 50 cm (19.68 in) away from the headset. Noise may result if the smartphone is too close to the
headset.
Your voice will be heard from the headset through the headset’s microphone (Sidetone function). In this case, ambient sounds or
the sounds of the headset operating procedure may be heard through the headset, but this is not a malfunction.
Related Topic
How to make a wireless connection to BLUETOOTH devices
Making a call
Functions for a phone call
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The headset may not be connected with the smartphone over HFP or HSP. Check the connection status on the
smartphone.
If music playback does not pause automatically, operate the playback device to pause playback.
Adjust the volume by pressing the volume up/volume down buttons of the headset.
When the volume reaches the maximum or minimum, an alarm sounds.
3
When you finish your phone call, press the call button on the headset to end the call.
If you received a call during music playback, music playback resumes automatically after ending the call.
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Making a call
You can talk on the phone hands-free via a BLUETOOTH connection on a smartphone that supports the following
BLUETOOTH profiles.
HFP : Hands-free Profile
HSP : Headset Profile
If your smartphone supports both HFP and HSP, set it to HFP.
The operating procedure may vary depending on the smartphone. Refer to the operating instructions supplied with
the smartphone.
Depending on the connected device or the application, the functions may not work properly even if you try to operate
them with the headset.
Connect the headset to a smartphone via a BLUETOOTH connection.
1
Operate your smartphone to make a call.
When you make a call, the dial tone is heard from the headset.
If you make a call during music playback, playback pauses.
If no dial tone is heard via the headset, switch the call device to the headset using your smartphone.
You can talk using the microphone (A) on the left unit.
2
Adjust the volume by pressing the volume up/volume down buttons of the headset.
When the volume reaches the maximum or minimum, an alarm sounds.
3
When you finish your phone call, press the call button (B) on the headset to end the call.
If you made a call during music playback, music playback resumes automatically after ending the call.
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Hint
The volume for a call can be adjusted during a telephone conversation only.
The headset volume during a call and during music playback can be independently adjusted. Even if you change the volume
during a call, the volume of music playback does not change.
Note
Depending on the connected device or playback application you are using, when you make a call during music playback,
playback may not resume automatically even after you finish the call.
Use a smartphone at least 50 cm (19.68 in) away from the headset. Noise may result if the smartphone is too close to the
headset.
Your voice will be heard from the headset through the headset’s microphone (Sidetone function). In this case, ambient sounds or
the sounds of the headset operating procedure may be heard through the headset, but this is not a malfunction.
Related Topic
How to make a wireless connection to BLUETOOTH devices
Receiving a call
Functions for a phone call
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Functions for a phone call
The functions available during a call may vary depending on the profile supported by your smartphone. In addition, even
if the profile is the same, the available functions may vary depending on the smartphone.
Depending on the connected device or the application, the functions may not work properly even if you try to operate
them with the headset.
Refer to the operating instructions supplied with the smartphone.
When the supported profile is HFP (Hands-free Profile)
During standby/music playback
Press and hold the call button (A) to start up the voice dial function of the smartphone, or activate the Google app on
the Android smartphone or Siri on the iPhone.
Outgoing call
Press the call button once to cancel an outgoing call.
Incoming call
Press the call button once to answer a call.
Press and hold the call button for about 2 seconds or more to reject a call.
During call
Press the call button once to finish a call.
When the supported profile is HSP (Headset Profile)
Outgoing call
Press the call button once to cancel an outgoing call.
Incoming call
Press the call button once to answer a call.
During call
Press the call button once to finish a call.
Related Topic
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Making a video call on your computer
When you make a video call on your computer, you can talk wirelessly from your headset.
Hint
In the following cases, select [Headset (WH-CH730N series Hands-Free)] on the settings of your computer to make connections.
See “Connecting to a paired computer (Windows 11)” or “Connecting to a paired computer (Mac)”.
When the video calling application settings cannot be confirmed
When you cannot select [Headset (WH-CH730N series Hands-Free)]
Note
Depending on the computer or application you are using, the headset may not work properly during a video call. This may be
improved by restarting the computer.
Related Topic
How to make a wireless connection to BLUETOOTH devices
Pairing and connecting with a computer (Windows® 11)
Pairing and connecting with a computer (Mac)
Connecting to a paired computer (Windows 11)
Connecting to a paired computer (Mac)
Disconnecting BLUETOOTH connection (after use)
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Connect the headset to your computer via a BLUETOOTH connection.
1
Launch the video calling application on your computer.
2
Check the settings (*) of the video calling application.
When you make a video call on your computer, select calling connections (HFP/HSP) and not music playback
connections (A2DP). If you select music playback connections (A2DP), a video call may not be available.
On the speaker settings, select calling connections [Headset (WH-CH730N series Hands-Free)] (**).
([Headphones (WH-CH730N series Stereo)] (**) is for music playback connections.)
On the microphone settings, select calling connections [Headset (WH-CH730N series Hands-Free)] (**).
Depending on the video calling application you are using, only [WH-CH730N series] may be displayed. If this is
the case, select [WH-CH730N series].
As for frequently asked questions and answers, refer to the customer support website.
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(*) Depending on the video calling application you are using, this function may not be available.
(**) Names may vary according to the computer or the video calling application you are using.
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Using Google Gemini
May not be supported in some countries and regions.
By connecting Google Gemini to your headset from the settings menu, you can receive assistance with various tasks via
chat.
For details, refer to the following website.
https://support.google.com/gemini/answer/15456140
Compatible smartphones
Android 13 or later
For more information about Google Gemini, refer to the following.
The operating instructions or support website for Android smartphones
The Google Play Store website
https://support.google.com/gemini/
Hint
Check or update the software version of the headset with the “Sound Connect” app.
When Google Gemini is not available for reasons such as not being connected to the network, you will hear a voice guidance
indicating unavailability from the headset. Notifications may be displayed on the screen of the connected device, but service
specifications may change without notice due to changes made by service providers.
Note
Google Gemini and the voice assist function (Google app) cannot be assigned to the headset at the same time.
Launch the “Sound Connect” app, and set the function when you press and hold the play button to [Digital
assistant].
The first time you use Google Gemini, make sure that Google Gemini is set as the primary AI assistant on the
connected smartphone.
1
Operate the play button (A) to use the Digital assistant.
Press and hold the button to input a voice command, and release the button to finish the voice command.
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Google Gemini and the voice assist function (Siri) cannot be assigned to the headset at the same time.
The function to operate the headset with Google Gemini depends on the specifications of Google Gemini.
The specifications of Google Gemini are subject to change without notice.
For details on the services provided by other companies such as Google Gemini, consult each service provider directly.
Sony shall assume no responsibility for any problems such as misunderstandings related to the services provided by other
companies.
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Using Tencent Xiaowei
This feature is available for models designed for the Chinese mainland.
By using Tencent Xiaowei that comes with the smartphone, you can speak to the headset’s microphone to operate the
smartphone or perform a search.
Compatible smartphones
A smartphone with Android 6.0 or later, or iOS 10 or later installed.
The latest version of the Tencent Xiaowei app is required.
For details on Tencent Xiaowei, refer to the following website.
https://xiaowei.tencent.com/guide/index.html?cid=1465
Hint
Check or update the software version of the headset with the “Sound Connect” app.
Note
Tencent Xiaowei and the voice assist function cannot be assigned to the headset at the same time.
Tencent Xiaowei is only available in China.
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Launch the “Sound Connect” app, and set the function when you press and hold the play button to
[Tencent Xiaowei].
1
Launch the Tencent Xiaowei app.
2
Operate the play button (A) to use the Tencent Xiaowei app.
Press and hold the button to input a voice command, and release the button to finish the voice command.
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Using the voice assist function (Google™ app)
By linking with the Google app on your Android smartphone, you can operate the Android smartphone by voice while
wearing the headset.
Set the assist and voice input selection to the Google app.
On the Android smartphone, select the following menus.
[Settings] - [Apps & notifications] - [Advanced] - [Default apps] - [Assist & voice input]
Then, set [Assist app] to the Google app.
The above operating procedure is an example. For more details, refer to the operating instructions supplied with the
Android smartphone.
The latest version of the Google app may be required.
Models for countries and regions excluding Chinese mainland:
For details on the Google app, refer to the operating instructions or the support website of the Android smartphone,
or the Google Play store website.
Models for Chinese mainland:
For details on the Google app, refer to the operating instructions or the support website of the Android smartphone.
The Google app may not be activated from the headset depending on specifications of the Android smartphone.
1
Connect the headset to the Android smartphone via BLUETOOTH connection.
2
When the Android smartphone is in standby or playing music, press and hold the play/call button (A) on the
headset for about 2 seconds or more.
The Google app is activated.
3
Talk to Google through the app using the headset’s microphone (B).
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Note
The voice assist function (Google app) and Google Gemini cannot be assigned to the headset at the same time.
The voice assist function (Google app) and Tencent Xiaowei cannot be assigned to the headset at the same time.
Even if “Hey Google” is enabled on your Android smartphone, you cannot use the “Hey Google” voice command to launch the
Google app.
When using the voice assist function, your voice will be heard from the headset through the headset’s microphone (Sidetone
function). In this case, ambient sounds or the sounds of the headset operating procedure may be heard through the headset, but
this is not a malfunction.
The Google app may not be activated depending on specifications of the smartphone or application version.
The Google app does not work when connected to a device not compatible with the voice assist function.
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For details on the apps which work with the Google app, refer to the operating instructions for the Android
smartphone.
After launching the Google app, voice input will be disabled if no speech is recorded for a certain period of time.
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Using the voice assist function (Siri)
By linking with Siri on your iPhone, you can operate the iPhone by voice while wearing the headset.
Note
The voice assist function (Siri) and Google Gemini cannot be assigned to the headset at the same time.
The voice assist function (Siri) and Tencent Xiaowei cannot be assigned to the headset at the same time.
Activate Siri.
On an iPhone, select [Settings] - [Siri & Search].
Enable [Press Home for Siri] and [Allow Siri When Locked].
The above operating procedure is an example. For details, refer to the operating instructions supplied with the
iPhone.
For details on Siri, refer to the operating instructions or support website of the iPhone.
1
Connect the headset to the iPhone via BLUETOOTH connection.
2
When the iPhone is in standby or playing music, press and hold the play/call button (A) on the headset until
Siri is activated.
Siri is activated.
3
Talk to Siri through the headset’s microphone (B).
For details on the apps which work with Siri, refer to the operating instructions for the iPhone.
After activating Siri, Siri will be deactivated if no voice input is detected for a certain period of time.
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Siri cannot be activated when you say “Hey Siri” even when the iPhone’s “Hey Siri” setting is enabled.
When using the voice assist function, your voice will be heard from the headset through the headset’s microphone (Sidetone
function). In this case, ambient sounds or the sounds of the headset operating procedure may be heard through the headset, but
this is not a malfunction.
Siri may not be activated depending on specifications of the smartphone or application version.
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Precautions
On BLUETOOTH communications
BLUETOOTH wireless technology is a short-range wireless technology that enables communication between digital
devices, such as smartphones and computers. The maximum communication distance may vary depending on the
presence of obstacles (people, metal objects, walls, etc.) or the electromagnetic environment.
Depending on the BLUETOOTH device connected to the headset, the communication environment, and the
surrounding conditions, noise or sound cut out may occur.
The maximum communication distance of the headset is approximately 10 m (32.8 ft). The communication distance
may vary depending on the surrounding environment.
Microwaves emitting from a BLUETOOTH device may affect the operation of electronic medical devices. Turn off the
headset and other BLUETOOTH devices in the following locations, as it may cause an accident:
in hospitals, near priority seating in trains, locations where inflammable gas is present, near automatic doors, or
near fire alarms.
When you use the headset on an airplane, follow flight crew directions. Radio waves may affect instruments, causing
risk of accident due to malfunction.
The audio playback on the headset may be delayed from that on the transmitting device, due to the characteristics of
BLUETOOTH wireless technology. As a result, the sound may not be in sync with the image when viewing movies or
playing games.
The headset supports security functions that comply with the BLUETOOTH standard as a means of ensuring security
during communication using BLUETOOTH wireless technology. However, depending on the configured settings and
other factors, this security may not be sufficient. Be careful when communicating using BLUETOOTH wireless
technology.
Sony shall assume no responsibility for any damages or loss resulting from information leaks that occur when using
BLUETOOTH communications.
BLUETOOTH connections with all BLUETOOTH devices cannot be guaranteed.
BLUETOOTH devices connected with the headset must comply with the BLUETOOTH standard prescribed by
Bluetooth SIG, Inc., and must be certified as compliant.
Even if a connected device complies with the BLUETOOTH standard described above, the connection may fail
depending on the characteristics and specifications of the device. Additionally, differences in operation methods,
display, or performance may occur.
When using the headset to perform hands-free talking on the phone, noise may occur depending on the
connected device or the communication environment.
Depending on the device to be connected, it may require some time to start communications.
Note on temperature rise
The temperature of the headset may rise while charging or when using the headset for a long period of time. This is
not a malfunction.
Note on static electricity
If you use the headset when the air is dry, you may experience mild tingling in your ears. This is not a malfunction of
the headset, but is caused by static electricity accumulated on your body. You can reduce the effect by wearing
clothes made of natural materials that do not easily generate static electricity.
Notes on wearing the headset
After use, remove the headset from your ears slowly. The headset has a high degree of sealing. If the headset is
pressed hard or suddenly removed from the ear, you may risk damaging your eardrum.
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When putting on the headset, noise may be generated from the diaphragm. This is not a malfunction.
Long-term use of the headset may cause symptoms such as itching and irritation in the ears.
If you experience any of the above symptoms while the headset is in use, stop using it immediately. Then, consult a
doctor, the Sony support contact, or your nearest Sony dealer.
Other notes
The headset is a precision device, so do not drop it or subject it to strong shocks. This may cause deformation or
damage, resulting in reduced performance.
The BLUETOOTH function may not work with a mobile phone, depending on the signal conditions and the
surrounding environment.
Depending on the signal conditions of your smartphone or the surrounding environment, you may not be able to use
the headset.
Do not breathe into the driver unit or the microphones.
Do not apply weight or pressure to the headset for long periods, including when it is stored, as it may cause
deformation. When storing the headset, do not apply force.
If you experience discomfort while using the headset, stop using it immediately.
The earpads are consumables. If they deteriorate or become damaged due to long-term use or storage, consult the
Sony support contact or your nearest Sony dealer.
The headset is not waterproof. If water or foreign matter enters the headset, this can result in burnout or malfunction.
If water or foreign matter enters the headset, stop use immediately. Then, consult the Sony support contact or your
nearest Sony dealer. In particular, be careful in the following cases.
When using the headset near a sink or liquid container
Be careful that the headset does not fall into a sink or container filled with water.
When using the headset in the rain or snow, or in humid locations
When using the headset while you are perspiring
If you touch the headset with wet hands or if the headset come into contact with wet clothing, the headset may get
wet.
Cleaning the headset
Occasionally clean the plug with a soft dry cloth.
Dust and dirt on the exterior of the headset can be wiped off with pure water type wet wipes. Do not use the following
items as they may damage the surface finish and lead to malfunction or breakage.
Wet wipes containing alcohol
Thinner
Benzine and other similar substances
Do not use the headset near medical devices
Radio waves can affect cardiac pacemakers and medical devices. Do not use the headset in crowded places such as
crowded trains or inside a medical institution.
The headset has magnets. These magnets may interfere with pacemakers, programmable shunt valves for
hydrocephalus treatment, or other medical devices. Do not place the headset close to persons who use such medical
devices. Consult your doctor before using the headset if you use any such medical devices.
Keep the headset away from magnetic cards
The headset has magnets. If a magnetic card comes near the headset, the card magnet may be affected or become
deactivated.
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Supported codecs
A codec is an “audio coding algorithm” used when transmitting sound wirelessly via a BLUETOOTH connection.
The headset supports the following codecs.
When connected using Classic Audio via an A2DP connection (for music playback): SBC, AAC
When the headset is connected using LE Audio, it supports LC3.
SBC
This is an abbreviation for Subband Codec.
SBC is the standard audio coding technology used in BLUETOOTH devices.
All BLUETOOTH devices support SBC.
AAC
This is an abbreviation for Advanced Audio Coding.
AAC is mainly used in Apple products such as iPhone that can provide a higher sound quality than that of SBC.
LC3
This is an abbreviation for Low Complexity Communication Codec.
LC3 is a codec for LE Audio and achieves low latency transmission.
When music is transmitted using one of the following codecs from a device connected via Classic Audio, the headset
automatically switches to that codec and plays back the music in the same format.
SBC, AAC
If the connected device supports a codec of higher sound quality than SBC, you may need to set the device beforehand
to enjoy music with the desired codec from the supported codecs.
Refer to the operating instructions supplied with the connected device to set the codec.
When connected to LE Audio, the music playback is performed in LC3 codec. For LE Audio connections, use the “Sound
Connect” app and set [Bluetooth Connection Quality] to [Low latency]. The [Priority on Sound Quality] setting at the time
of purchase does not support LE Audio connection.
Refer to the operating instructions supplied with the device you are connecting to, as some settings may be necessary in
advance.
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How to keep the software up-to-date (for comfortable use of the headset)
Update the headset software to enjoy new functions and resolve certain issues. Update the headset software using the
“Sound Connect” app.
For details on the latest headset software and how to update the software, refer to the information on the support
website.
You can update the headset software in the following way.
Note
It is recommended to disable the automatic power off function of the headset before the update.
In the factory settings, when the headset is not connected via BLUETOOTH connection for about 15 minutes, the headset turns
off automatically. This setting can be changed using the “Sound Connect” app.
Before performing an update, disconnect any other BLUETOOTH devices connected to the mobile device being used for the
update.
Software may not be updated when the mobile device is connected with other devices compatible with BLUETOOTH Low Energy
(such as wearable devices or smart watches).
Note the following if the update cannot be completed.
Close all the apps installed on the mobile device except the “Sound Connect” app.
Fully charge the headset and the mobile device.
Put the headset and the mobile device being used for the update as close to each other as possible before starting the update.
Do not start the update if there are wireless LAN devices or other BLUETOOTH devices nearby.
Turn off the power saving mode (*) of your mobile device before updating the software.
Depending on the OS version of your mobile device, the update may not be completed under the power saving mode.
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Turn on the headset.
Press and hold the power button (A) for about 2 seconds or more.
1
Launch the “Sound Connect” app on a mobile device such as a smartphone.
2
Update the headset software following the on-screen instructions.
3
(*) Names may vary according to the mobile device you are using.
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To prevent burning or malfunction due to getting wet
On waterproof performance of the headset
The headset is not waterproof. If water or foreign matter enters the headset, this can result in burnout or malfunction.
Avoid situations such as the following and be careful not to expose the headset to moisture or dirt.
Using the headset in the rain or snow.
Touching the headset without drying wet hands after doing housework in the kitchen or washing hands in the
washroom.
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Touching the headset with sweaty hands, or using the headset in situations where the headset may get soaked in
sweat.
Putting the headset in a bag with a cold PET bottle.
If the headset gets wet, or water enters the headset
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If a wet headset is charged or turned on, this can result in burnout or malfunction. While subjecting the headset to as little
vibration as possible, turn the earpads downward slowly, and let water drain from the earpads. Then, position the headset
upright and put a dry cloth under the USB Type-C port (A) and headphone cable input jack (B) until no more water comes
out from the inside. After that, leave the headset in a shaded, well-ventilated place until it is completely dry.
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Licenses
This product contains software that Sony uses under a licensing agreement with the owner of its copyright. We are
obligated to announce the contents of the agreement to customers under requirement by the owner of copyright for
the software. Please access the following URL and read the contents of the license.
https://rd1.sony.net/help/mdr/sl/26/
Use of the Made for Apple badge means that an accessory has been designed to connect specifically to the Apple
product(s) identified in the badge and has been certified by the developer to meet Apple performance standards.
Apple is not responsible for the operation of this device or its compliance with safety and regulatory standards.
Network services, content and the (operating system and) software of this product may be subject to individual terms
and conditions and changed, interrupted or discontinued at any time and may require fees, registration and credit
card information.
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Trademarks
Google, Android, Gemini and Google Play are trademarks of Google LLC.
Apple, iPhone, macOS, Mac and Siri are trademarks of Apple Inc., registered in the U.S. and other countries and
regions.
App Store is a service mark of Apple Inc., registered in the U.S. and other countries and regions.
IOS is a trademark or registered trademark of Cisco in the U.S. and other countries and is used under license.
Microsoft and Windows are registered trademarks or trademarks of Microsoft Corporation in the United States and/or
other countries.
The BLUETOOTH® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. The Auracast™
word mark and logos are trademarks owned by Bluetooth SIG, Inc. Any use of such marks by Sony Group
Corporation and its subsidiaries is under license.
USB Type-C® and USB-C® are registered trademarks of USB Implementers Forum.
DSEE is a trademark or registered trademark of Sony Group Corporation or its affiliates.
All other trademarks and registered trademarks are trademarks or registered trademarks of their respective holders.
In this manual, ™ and ® marks are not specified.
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Troubleshooting
If you have any problems, please follow the process below.
Related Topic
Charging
Resetting the headset
Initializing the headset to restore factory settings
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1. Turn the headset off, charge it, and then turn it on again.
2. Restart the device being connected such as your computer or smartphone.
3. Access the Sony support site from the menu of the “Sound Connect” app to search for the cause and
solution of the issue, or check the support site below.
https://www.sony.net/support/WH-CH730N/
4. Reset the headset.
5. Initialize the headset.
6. Should any problems persist, consult the Sony support contact below or your nearest Sony dealer.
https://www.sony.net/support-contact
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Resetting the headset
If the headset cannot be turned on or cannot be operated even when it is turned on, reset the headset.
The pairing information and other settings are retained.
If the headset does not operate correctly even after resetting, initialize the headset to restore factory settings.
Related Topic
Initializing the headset to restore factory settings
Connect the headset to an AC outlet.
Use a USB Type-C cable and USB AC adaptor (A).
1
Press the power button (B) and the noise canceling/Ambient Sound Mode button (C) simultaneously.
The headset will be reset (the indicator turns off and then lights up again).
2
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Initializing the headset to restore factory settings
If the headset does not operate correctly even after resetting, initialize the headset.
This operating procedure resets the volume settings and other settings to the factory settings and deletes all pairing
information. In this case, delete the pairing information for the headset from the connected device and then pair them
again.
If the headset does not operate correctly even after initializing, consult your nearest Sony dealer.
Related Topic
Resetting the headset
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Turn off the headset.
Remove the USB Type-C cable.
1
Press and hold the power button (A) and play/call button (B) for about 10 seconds or more.
When initializing is complete, the indicator flashes in blue 4 times.
2
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Specifications
Power source:
DC 5 V (Using a commercially available USB AC Adaptor)
Using built-in lithium-ion batteries (Product Operation Power: DC 3.85 V)
Charging time:
Approx. 3 hours
Note
Charging hours may be different depending on the conditions of use.
Charging temperature:
5 °C to 35 °C (41 °F to 95 °F)
Operating temperature:
0 °C to 40 °C (32 °F to 104 °F)
Mass:
Approx. 207 g (7.3 oz)
Impedance:
100 Ω (1 kHz) (when connecting via the headphone cable with the headset turned on)
25 Ω (1 kHz) (when connecting via the headphone cable with the headset turned off)
Sensitivity:
108 dB/mW (when connecting via the headphone cable with the headset turned on)
100 dB/mW (when connecting via the headphone cable with the headset turned off)
Frequency response:
6 Hz - 20 000 Hz (IEC) (1)
(when connecting via the headphone cable with the headset turned on)
Communication system:
BLUETOOTH
Design and specifications are subject to change without notice.
Depending on the country or region where you purchased your headset, some models may not be available for
purchase.
Compatible iPhone models
iPhone 16e
(1) IEC = International Electrotechnical Commission
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iPhone 16 Pro Max
iPhone 16 Pro
iPhone 16 Plus
iPhone 16
iPhone 15 Pro Max
iPhone 15 Pro
iPhone 15 Plus
iPhone 15
iPhone 14 Pro Max
iPhone 14 Pro
iPhone 14 Plus
iPhone 14
iPhone SE (3rd generation)
iPhone 13 Pro Max
iPhone 13 Pro
iPhone 13
iPhone 13 mini
iPhone 12 Pro Max
iPhone 12 Pro
iPhone 12
iPhone 12 mini
iPhone SE (2nd generation)
iPhone 11 Pro Max
iPhone 11 Pro
iPhone 11
(As of March 2026)
Depending on the iOS supported by the above models, the “Sound Connect” app may not be usable.
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