OWNER’S MANUAL
For user safety and convenience, please read the user manual before using
the product.
Model
TONE-T90S
Bluetooth
®
LG Stereo Headset
www.lg.com
Copyright © 2023 LG Electronics Inc. All Rights Reserved.
2
Exploring the Product
3 Charging Case
4 Earbuds
Connecting with Bluetooth for
Use
5 Connecting the Smartphone to Earbuds
via Bluetooth
6 Multiple Connections
6 Automatic Reconnection
Listening to Sound with
Earbuds
7 Wearing Earbuds
8 Listening to Music
9 Receiving Phone Call
10 Listening to Ambient Sound/Active Noise
Cancellation (ANC)
Connecting to an External
Device for Use (Plug and
Wireless Mode)
12 Connecting
13 Connecting and Disconnecting with an
Analog Device
15 Connecting and Disconnecting with a USB
Audio Device
Charging
17 Charging by Wire
18 Charging Wirelessly
19 Description on UVnano
20 Checking Battery Status
Connecting to the Bluetooth
App
22 Connecting the LG TONE Free App
Safety Precautions
23 Safety Notices and Warnings
25 Precautions when Using the Product
25 Prevention of product misuse
Things to Check before
Reporting Malfunction
26 Troubleshooting
Appendix
27 Product Specifications
Safety Information
28 Prevention of Hearing Loss
28 Additional Information
28 Radio frequency exposure
29 Bluetooth connection precautions
29 Battery Information
30 Registered Trademarks and Licenses
Cleaning Guide
31 How to clean the ear gel and multi-
function foam
Contents
3
Exploring the Product
Charging Case
A
G
E
F
D
C
B
D
A Mood light: When you open the charging case, the mood light turns on and off.
B Case charging port: You can charge a device or use Plug and Wireless mode.
C Plug and Wireless mode switch: You can connect analog and USB audio devices and the charging case
to listen to the sound through the earbuds.
D UVnano LED: If you charge the device with the earbuds attached and the cover closed, the UVnano
LED operates for 10 minutes.
E Battery status indicator (up): You can check the battery status of the earbuds or charging case.
F UVnano indicator (down): The UVnano indicator is blue while the UVnano LED is operating.
G Earbuds charging terminals: You can charge the earbuds by attaching them to the charging case.
Exploring the Product
4
Earbuds
A
A
C
D
B
A Microphone
B Speaker mesh (microphone)
C Touch pad
D Earbuds charging terminals
Note
• Be careful that foreign substances are not over the Earbuds charging terminals.
5
Connecting with Bluetooth for Use
Connecting the Smartphone to Earbuds via Bluetooth
a Turn on the Bluetooth
®
function of your smartphone or a device you want to connect.
b Open the cover with earbuds attached to the charging case. The blue battery status indicator on the
front blinks. If the blue battery status indicator does not blink, or if you want to connect a device
other than the one already connected, touch and hold the touch pad of the left or right earbud for
3 - 5 seconds.
~1m
c When the Fast Pair connection pop-up appears at the bottom of the smartphone screen, touch the
pop-up to connect.
• Only Android™ 6.0 or higher is supported, and Bluetooth
®
and location information settings of the
mobile device are required.
d If the connection pop-up does not show up, select and connect [TONE-T90S] in the Bluetooth
®
menu
of the smartphone. (For users of iOS or Android 5.0 or lower)
• TONE-T90S_LE is not a valid connection model name in the Bluetooth
®
connection device list.
Check the model name you are using and connect with the model name that does not contain “LE”.
• If the earbuds model name is displayed abnormally on the Android device, please change the model
name in the Bluetooth
®
menu of the settings of the connected device.
Note
• To connect with another device, perform the above procedures again.
Connecting with Bluetooth for Use
6
Multiple Connections
If you use the LG TONE Free app, you can connect and use two devices, such as a smartphone and a PC at
the same time.
a Please activate Multi-Point & Multi-Pairing on the LG TONE Free app.
b Put the earbuds in the charging case and perform the connecting procedures in the same way.
c The existing connection device becomes the “main connection device” and the newly connected
device becomes the “auxiliary connection device”.
d You can use the multi-connection function more conveniently in the detailed Multi-Point & Multi-
Pairing settings.
e Of the two devices, the sound of the device with which you played the content lastly is heard. (When
the charging case is connected with a USB-C™ to AUX cable in Plug & Wireless mode, it changes to
the charging case sound when the “main connection device” is not playing or talking.)
Note
• When the two devices are connected at the same time, the main function operates based on the “main
connection device”.
• In some media players, the sound may not switch automatically when content is played.
• When connected to an external device in Plug and Wireless mode, the Bluetooth connection is
disconnected.
Automatic Reconnection
If you open the charging case of the earbuds, they are automatically connected to the last connected and
used device. (If the device cannot be found, it changes to the connectable mode.)
If automatic reconnection is not done, search for earbuds on the device to be connected and connect
them manually.
7
Listening to Sound with Earbuds
Wearing Earbuds
a Remove the earbuds from the charging case by bending the inside of the earbuds outward, and then
wear them to fit tightly into your ears.
Note
• If you use an ear gel sized to fit your ears, you can improve performance of active noise cancellation
(ANC). You can then listen to music with rich sound quality.
b If you wear earbuds properly, you can hear a notification detection sound.
* To replace the ear gel, align the hole shape of the ear gel with the protrusion of the earbuds and fasten
it. (Make sure the multi function foam is well inserted into the inner part of the ear gel.)
Listening to Sound with Earbuds
8
Listening to Music
Function How to Use
Play/Pause
: Touch the left or right earbud once.
Volume control
: Touch the left (volume down) or right (volume up)
earbud twice.
Next song
: Touch the left or right earbud three times.
Note
• You can change how to use the function in the touch function settings of the LG TONE Free app.
9
Receiving Phone Call
Function How to Use
Receiving calls
: Touch the left or right earbud once.
Hanging up calls
: Touch the left or right earbud twice.
Rejecting calls
: Touch and hold the left or right earbud.
Smartphone call function
Function/Status Description
Receiving calls/When receiving
phone calls
Touch the left or right earbud once.
Making calls/Waiting to use
When you make a call from your smartphone, the call is
automatically connected to the headset.
Receiving another call during a call/
During a call
If you touch the left or right earbud once, the current phone
call is switched to the standby status and you can receive an
incoming call during a call.
If an existing call is on hold, you can end the current call on
your smartphone. (This operates differently depending on the
smartphone settings.)
10
Listening to Ambient Sound/Active Noise Cancellation
(ANC)
Listening to ambient sound
The listening to ambient sound function makes you hear outside sounds, so that you can be aware about
your surroundings and hazards.
11
Active noise cancellation (ANC)
The active noise cancellation (ANC) function blocks external sounds during use. Therefore, use it when
you do not want to be disturbed while listening to music or watching a video.
• If you touch and hold the left or right earbud, you can switch between active noise cancellation
(ANC) and listening to ambient sound.
• You can set listening to ambient sound or active noise cancellation (ANC) functions in the LG TONE
Free app.
• You can set listening mode and conversation mode in the LG TONE Free app.
• When using listening to ambient sound function or active noise cancellation (ANC) function, the
available time is shorter than while it is turned off.
• The listening to ambient sound or active noise cancellation (ANC) function operates when you are in
standby/listening to music/during a call.
- ANC stands for active noise cancellation.
> Caution
• When the ambient sound mode is executed, you may hear a loud ambient sound suddenly. Pay
attention to safety when using active noise cancellation (ANC) outdoors.
12
Connecting to an External Device
for Use (Plug and Wireless Mode)
Connecting
You can connect the charging case to an analog device such as audio in airplane seat, treadmill, cassette,
radio, TV or a USB audio device such as PC to listen to the sound with an earbuds.
Connecting with an analog device
Function How to Use
Mute or unmute
: Touch the left or right earbud once.
Decrease volume (left touch)
Increase volume (right touch)
: Touch the left or right earbud twice.
Connecting with a USB audio device
Function How to Use
Play/Pause
: Touch the left or right earbud once.
Decrease volume (left touch)
Increase volume (right touch)
: Touch the left or right earbud twice.
Play the next song
: Touch the left or right earbud three times.
Connecting to an External Device for Use
(Plug and Wireless Mode)
13
Connecting and Disconnecting with an Analog Device
Connecting with an analog device
a Connect the USB-C™ port of the USB-C™ to AUX cable to the charging case.
b Connect the AUX terminal to a desired device.
c Wear earbuds on your ears.
d Slide the Plug and Wireless mode switch to the right to turn on the mode.
e The indicator on the charging case blinks green.
f When the charging case and earbuds are connected, the indicator turns off.
14
Disconnecting with an analog device
a Push the Plug and Wireless mode switch to the left.
b The indicator on the charging case blinks blue.
c When disconnected, it is reconnected with the device with which has been previously connected.
• If you cannot find a device which has been previously connected, it enters the Connectable mode.
Note
• The LG TONE Free app cannot be used, and the EQ or touch function settings are retained.
• It does not support the call function.
• The USB-C™ to AUX cable does not support the charging function.
• The product may not be compatible with some devices, and certain airplane seats may require a
conversion adapter (sold separately).
• If you use the product for a long time, the use time (including the charging case) may be shorter than
when connecting and using a smartphone.
15
Connecting and Disconnecting with a USB Audio Device
Connecting with a USB audio device
a Connect the USB-C terminal of the included USB Type-C™ Charging and Data cable to the charging
case.
b Connect the USB-C terminal to a desired device.
c Wear earbuds on your ears.
d Slide the Plug and Wireless mode switch to the right to turn on the mode.
e The indicator on the charging case blinks green.
f Once the charging case is connected to the earbuds, the green indicator turns off and the case
charging status is displayed.
16
Disconnecting with a USB audio device
a Push the Plug and Wireless mode switch to the left.
b The indicator on the charging case blinks blue.
c When disconnected, it is reconnected with the device with which has been previously connected.
• If you cannot find a device which has been previously connected, it enters the Connectable mode.
Note
• When connected with a USB audio, it supports the call function and is displayed as TONE-T90SC on the
USB audio device.
• If you use the product for a long time, the use time (including the charging case) may be shorter than
when connecting and using a smartphone.
17
Charging
Charging by Wire
If you connect the charging cable, the charging status shows up on the charging case.
Note
• The earbuds and charging case are charged at the same time.
• The Case charging port of the charging case does not support the power supply function to other
devices such as smartphone.
Charging
18
Charging Wirelessly
Place the charging case on the center of the wireless charger.
Note
• A wireless charger is not provided.
• For some wireless chargers, the wireless charging function may not operate.
• For wireless charging, it takes a long to charge.
• If you charge the device with the earbuds attached and the cover closed, the UVnano LED operates for
10 minutes.
19
Description on UVnano
The charging case has a built-in UVnano LED to keep the earbuds clean.
If you charge the device with the earbuds attached and the cover closed, the UVnano LED operates for 10
minutes.
* UVnano is a compound word of UV and nanometer, the unit of UV.
Note
• The UVnano indicator is blue while the UVnano LED is in operation.
• The UVnano charging case removes up to 99.9% of harmful germs from ear gel.
• The white product may have a different colour on the UVnano LED contact part, but there is no
problem with performance.
> Caution
• Please note that the temperature of the earbuds may become higher while the UVnano LED is
operating.
20
Checking Battery Status
If you open the charging case, the battery status of the earbuds is displayed.
When the earbuds are not attached, the battery status of the charging case is displayed.
Battery status indicator
Battery level state (charger not connected) /
Charging status (charger connected)
Red
20% or less /
Charging
Yellow
20% ~ 80% /
-
Green
80% or higher /
Fully charged
Note
• If you close the charging case, the battery status of the charging case is displayed.
• When the battery in the charging case is completely consumed, the earbuds cannot be turned on or off.
Please charge the charging case.
21
Battery status indicator
Status Operation
Bluetooth
®
search mode The blue battery status indicator blinks.
Battery 20% or less The red battery status indicator turns on and off.
Battery 20% ~ 80% The yellow battery status indicator turns on and off.
Battery 80% or higher The green battery status indicator turns on and off.
When a charging error occurs The red battery status indicator blinks.
While battery is charged (charger
connected)
The red battery status indicator turns on.
Battery charging completed (charger
connected)
The green battery status indicator turns on.
22
Connecting to the Bluetooth App
Connecting the LG TONE Free App
a Search for “LG TONE Free” on Google Play Store or App Store on your smartphone or scan the QR
code below to install the LG TONE Free app.
b Run the app to use various functions (checking the earbuds battery, voice notification, changing the
equalizer mode, checking the information on the last connected location, searching for my wireless
earbuds, etc.) Only Android 7.0 or iOS 13 or higher is supported.
<Android>
<iOS>
Connecting to the Bluetooth App
23
Safety Precautions
Safety Notices and Warnings
The following “Safety Precautions” are to prevent unexpected dangers or damages, so be sure to read
them thoroughly.
‘Safety Precautions’ are divided into ‘Warning’ and ‘Caution’.
. WARNING: Failure to follow the instructions may result in serious injury or death.
> Caution: Failure to follow the instructions may result in minor injury or product damage.
. Warning
• Do not drop the product from a high place.
• Make sure there is no alcohol, or benzene in contact with the product.
• Do not store the product in a wet or dusty place.
• Do not place heavy objects on the product.
• Earbuds tested under controlled laboratory conditions with an IPX4 rating.
Resistant to splashed water. Dry before using. Do not charge while wet. Case has
not been tested for IPX4.
Safety Precautions
24
> Caution
• Do not disassemble, adjust, or repair the product.
• Do not place the product near excessive heat or flammable material.
• The product may be damaged if an incompatible charger is used.
• Keep small components of the product away from infants or children.
• Make sure that foreign objects do not enter the charger’s connectors (Case
charging port and power plug). Foreign objects in the charger’s connectors may
result in fire or electric shock.
• If you have a medical device implanted, contact your doctor before using this
device.
• For your safety, do not remove the battery incorporated in the product.
• This product has a built-in battery, and the battery cannot be removed or
replaced.
• If you arbitrarily replace the battery or don’t replace it correctly, it may explode.
• The lithium-ion battery is a hazardous component that can cause injury.
• Battery replacement by an unqualified professional can cause damage to your
device.
• Do not discard the battery arbitrarily. Follow the local procedure for discarding
batteries.
• In order to prevent unnecessary energy consumption, disconnect the device
when fully charged. Always use an easily accessible power outlet for charging
your device.
• Risk of fire or explosion if the battery is replaced by an incorrect type.
• Do not store or transport at pressures lower than 11.6 kPa and at above 15,000
m altitude.
25
> Caution
• Replacement of a battery with an incorrect type that can defeat a safeguard (for
example, in the case of some lithium battery types).
• Disposal of a battery into fire or a hot oven, or mechanically crushing or cutting
of a battery, may result in an explosion.
• Leaving a battery in an extremely high temperature surrounding environment
that can result in an explosion or the leakage of flammable liquid or gas.
• A battery subjected to extremely low air pressure may result in an explosion or
the leakage of flammable liquid or gas.
• Do not carelessly throw away old batteries. It can cause an explosion or fire. The
disposal method may vary by country and region. Dispose of it in an appropriate
manner.
Precautions when Using the Product
Wipe the product clean if it has been exposed to a lot of sweat.
Keep the area around the earphones clean.
If you wear earphones for a long time, it may cause pain, and if the moisture in the ears remains long, it
may cause skin trouble.
Prevention of product misuse
To prevent misuse of the product, please be sure to check the contents below.
Precautions for using the product
• You cannot charge external devices with the USB port.
• When moving the product, pull out the power cord and all cables connected to the product.
- Otherwise, it may cause a fire or electric shock.
• Do not open or close the cover of the charging case with excessive force.
• Do not mount the earbuds on the charging case with the left and right sides reversed.
- If you mount the earbuds reversed and close the cover of the charging case forcefully, it may result in
a product breakdown.
• Make sure that water or any other liquid does not get into the charging case.
- If liquid gets into the charging case, it may cause a breakdown.
• Be careful not to insert or touch foreign substances into the charging port.
26
Things to Check before Reporting
Malfunction
Troubleshooting
If you experience the following symptoms while using the product, please check them again. They may not
be malfunctions.
Symptom Cause and Solution
If the power does not
turn on
• Check the battery level and charge it.
If a call cannot be
made with the earbuds
• If your smartphone does not support the hands-free function, you
cannot use the call function.
• Check the battery level and charge it.
If you cannot register
the earbuds into the
smartphone
• Check whether power is turned on by opening the cover of the charging
case.
• Check that the earbuds are switched to search mode.
- If you touch and hold the touchpad on the left or right side of the
earbuds for 3 to 5 seconds with the earbuds in the charging case, it
is switched to search mode.
• Check whether Plug and Wireless mode switch is turned on.
If you have replaced
the earbuds or
have problems with
operation (factory
reset).
• Touch and hold the left or right touchpad of the earbuds for more than
10 seconds with the earbuds in the charging case.
- The battery status indicator of the charging case blinks red and the
factory reset progresses. Please reconnect the earbuds after factory
reset.
*You cannot use the factory reset and discovery mode in Plug and Wireless mode.
Things to Check before Reporting
Malfunction
27
Appendix
Product Specifications
General Description
Bluetooth
Specifications
V 5.4 (HFP/A2DP/AVRCP)
Battery
Earbud: 3.85 V / 51 mAh, Lithium-ion
Charging case: 3.85 V / 475 mAh, Lithium-ion
Music Play Time
Earbuds & With
Charging case
ANC Off: Up to 9 & Up to 36 hours*
ANC On: Up to 5 & Up to 20 hours*
Charging time
Earbud: within an hour
Charging case: within 2 hours 30 minutes*
Fast Charging: 5 min charge for up to 60 min playtime*
• When charging wired at room temperature
Rated Input Voltage
Earbud: 5 V 0, 120 mA
Charging case: 5 V 0, 650 mA
*The use time may vary depending on the connected smartphone or use functions, settings, signal
strength, operation temperature, using frequency band, and other use methods.
Operating
Temperature
0 °C ~ +40 °C
Operating Humidity 5 % ~ 60 %
Dimensions (mm) /
Weight (g)
Earbud: 21.6 mm (W) X 21.9 mm (L) X 24.2 mm (H) / 5.7 g (One earbud)
Charging case: 65.0 mm (W) X 29.9 mm (L) X 32.6 mm (H) / 43.0 g
Frequency range 2402 MHz to 2480 MHz
*Duration of use and charging time may vary depending on the connected mobile device or charging
adapter, features being used, settings, signal strength, operating temperature, frequency band, and other
methods of use.
Appendix
28
Safety Information
Prevention of Hearing Loss
If the volume of the headset is too high, you can experience permanent hearing loss.
Set the volume to a safe level. It may sound normal, but if you often listen to high-
pitch sounds that can damage your hearing, your ears get used to it over time.
If you feel ringing in your ears or hear faint voice, stop listening and get a hearing test.
The louder the volume, the faster your hearing can be damaged.
Experts suggest you to do the followings to protect your hearing.
• Limit the time for using the headset with the high volume.
• Avoid the habit to turn up the volume not to hear loud noises around you.
• If you cannot hear people nearby, turn the volume down.
For how to set the maximum volume limit of the connection device, refer to the user manual provided
with the connection device.
Additional Information
The Bluetooth
®
word mark and logos are registered trademarks owned by the Bluetooth SIG, Inc. and
any use of such marks by LG Electronics is under license.
Other trademarks and trade names are those of their respective owners.
Android, Google Play, the Google Play logo, and other related marks and logos are trademarks of Google
LLC.
Radio frequency exposure
This Bluetooth LG Stereo Headset is a radio transmitter and receiver. When in operation, it communicates
with a Bluetooth-equipped mobile device by receiving and transmitting radio frequency (RF)
electromagnetic fields (microwaves) in the frequency range 2402 to 2480 MHz.
Safety information
29
Bluetooth connection precautions
The following environments affect the range and reception of Bluetooth signals:
- When walls, metal, human bodies, or other obstacles exist between the Bluetooth device and the
connected device.
- When equipment that uses 2.4 GHz frequency signals (wireless LANs, wireless phones, microwave
ovens, etc.) is placed near the devices being used.
- When using a Bluetooth device (TV, laptop, etc.) other than the mobile phone, the sound quality may be
affected by the specifications and performance of the device.
Battery Information
A rechargeable battery has a long service life if treated properly. A new battery or one that has not been
used for a long period of time could have reduced capacity the first few times it is used. Do not expose
the battery to extreme temperatures, never above +50°C or below -10°C. For maximum battery capacity,
use the battery at room temperature. If the battery is used in low temperatures, the battery capacity will
be reduced. The battery can only be charged in temperatures between 0°C and +45°C.
[For coin battery application]
• INGESTION HAZARD: This product contains a button cell or coin battery.
• DEATH or serious injury can occur if ingested.
• A swallowed button cell or coin battery can cause Internal Chemical Burns
in as little as 2 hours.
• KEEP new and used batteries OUT OF REACH of CHILDREN
• Seek immediate medical attention if a battery is suspected to be
swallowed or inserted inside any part of the body.
WARNING
• Remove and immediately recycle or dispose of used batteries according to local regulations and keep
away from children. Do NOT dispose of batteries in household trash or incinerate.
• Even used batteries may cause severe injury or death.
• Call a local poison control center for treatment information.
• The compatible battery type is only VDL 1240H
• The nominal battery voltage is 3.85 V
• Non-rechargeable batteries are not to be recharged.
• Do not force discharge, recharge, disassemble, heat above (manufacturer’s specified temperature
rating) or incinerate. Doing so may result in injury due to venting, leakage or explosion resulting in
chemical burns.
30
Registered Trademarks and Licenses
All trademarks and trade names are owned by their respective owners.
“Made for iPhone” mean that an electronic accessory has been designed to connect specifically to iPhone,
respectively, 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. Please
note that the use of this accessory with iPhone may affect wireless performance.
Dolby, Dolby Atmos, and the double-D symbol are registered trademarks of Dolby Laboratories Licensing
Corporation. Manufactured under license from Dolby Laboratories. Confidential unpublished works.
Copyright © 2012–2020 Dolby Laboratories. All rights reserved.
Snapdragon Sound is a product of Qualcomm Technologies, Inc. and/or its subsidiaries. Snapdragon and
Snapdragon Sound are trademarks or registered trademarks of Qualcomm Incorporated.
Symbols
0 : Direct current (DC)
The spelling errors or inaccurate contents in this user manual are subject to change without
prior notice by LG Electronics.
The output level shall automatically return to an output level not exceeding RS1 when the power
is switched off.
31
Cleaning Guide
How to clean the ear gel and multi-function foam
If the ear gel or multi-function foam is clogged, the sound or ANC performance may be reduced.
You must clean the ear gel and multi-function foam periodically to ensure the best performance of your
earbuds.
A
Earbuds
A Speaker mesh
Multi-function foam
Ear gel
Please follow these steps to clean the ear gel and multi-function foam:
a Separate the ear gel from the earbuds.
b Separate the multi-function foam from the ear gel.
c Remove any residue (earwax, sebum etc.) from the ear gel and multi-function foam using lukewarm
water.
* If the multi-function foam is damaged, use the extra multi-function foam provided.
d Put the multi-function foam into the ear gel and reassemble into your earbuds.
* Ensure that any water has dried completely before reassembling.
Cleaning Guide
