QUIETCOMFORT ULTRA HEADPHONES
Cue the
music.
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IMPORTANT SAFETY INSTRUCTIONS
Please read and keep all safety and use instructions.
Bose Corporation hereby declares that this product is in compliance with the essential requirements
and other relevant provisions of Directive 2014/53/EU and all other applicable EU directive
requirements. The complete declaration of conformity can be found at: www.Bose.com/compliancewww.Bose.com/compliance
This product conforms to all applicable Electromagnetic Compatibility Regulations 2016 and all other
applicable UK regulations. The complete declaration of conformity can be found at:
www.Bose.com/compliancewww.Bose.com/compliance
Bose Corporation hereby declares that this product is in compliance with the essential requirements
per Radio Equipment Regulations 2017 and all other applicable UK regulations. The complete
declaration of conformity can be found at: www.Bose.com/compliancewww.Bose.com/compliance
Important Safety Instructions
Do not use this apparatus near water.
Clean only with a dry cloth or water dampened cloth. Do not use cleaning products.
Refer all servicing to qualified personnel. Servicing is required when the apparatus has been damaged in any
way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the
apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has
been dropped.
WARNINGS/CAUTIONS
• Place your hands around the middle of each earcup when rotating, folding, and placing the headphones in
the case and removing from the case. Keep your fingers away from the hinges to avoid pinching.
• Product is not intended for use by children.
• To avoid hearing damage, do not use your headphones at a high volume. Turn the volume down on your
product before placing the headphones in/on your ears, then turn the volume up gradually until you reach a
comfortable, moderate listening level.
• Use of this product while operating a vehicle is not recommended and may be prohibited by law in some
locations. Use caution and follow applicable laws regarding headphone use while operating a vehicle. Stop
using your headphones immediately if they interfere with your ability to remain aentive or if they interfere
with your ability to hear surrounding sounds, including alarms and warning signals, while operating a vehicle.
• Use caution if using these headphones while performing any activity that requires your aention. Do not use
the headphones when the inability to clearly hear surrounding sounds may present a danger to yourself or
others, for example while riding a bicycle or walking in or near traic, a construction site, railroad, etc.
• Do NOT use the headphones if they emit any loud unusual noise. If this happens, turn the headphones o
and contact Bose customer service.
• Remove product immediately if you notice heat coming from the product.
Contains small parts which may be a choking hazard. Not suitable for children under age 3.
This product contains magnetic material. Consult your physician on whether this might aect your
implantable medical device.
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IMPORTANT SAFETY INSTRUCTIONS
• To reduce the risk of fire or electrical shock do NOT expose this product to rain, dripping, splashing, or
moisture and do not place liquid filled objects such as vases, on or near the product.
• Keep the product away from fire and heat sources. Do NOT place naked flame sources, such as lighted
candles, on or near the product.
• Use this product only with an agency approved LPS power supply which meets local regulatory requirements
(e.g., UL, CSA, VDE, CCC).
• Do NOT make unauthorized alterations to this product.
• If the baery leaks, do not allow the liquid to come in contact with the skin or eyes. If contact is made, seek
medical advice.
• Do not expose products containing baeries to excessive heat (e.g. from storage in direct sunlight, fire or
the like).
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REGULATORY AND LEGAL INFORMATION
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against
harmful interference in a residential installation. This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or television reception, which
can be determined by turning the equipment o and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
• Reorient or relocate the receiving product or antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit dierent from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
Changes or modifications not expressly approved by Bose Corporation could void the user’s authority to
operate this equipment.
This device complies with part 15 of the FCC Rules and with ISED Canada license-exempt RSS standard(s).
Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that may cause
undesired operation.
This device complies with FCC and ISED Canada radiation exposure limits set forth for general population.
This transmier must not be co-located or operating in conjunction with any other antenna or transmier.
Meets IMDA Requirements.
FCC ID: A94440108 | IC: 3232A-440108
CAN ICES-3(B)/NMB-3(B)
For Europe: Frequency band of operation 2400 to 2483.5 MHz. | Maximum transmit power less than
20 dBm EIRP.
This symbol means the product must not be discarded as household waste, and should be delivered to
an appropriate collection facility for recycling. Proper disposal and recycling helps protect natural
resources, human health and the environment. For more information on disposal and recycling of this
product, contact your local municipality, disposal service, or the shop where you bought this product.
Low-power Radio-frequency Devices Technical Regulations: Without permission granted by the NCC, any
company, enterprise, or user is not allowed to change frequency, enhance transmiing power or alter original
characteristic as well as performance to a approved low power radio-frequency devices. The low power
radio-frequency devices shall not influence aircraft security and interfere legal communications; If found,
the user shall cease operating immediately until no interference is achieved. The said legal communications
means radio communications is operated in compliance with the Telecommunications Management Act. The
low power radio-frequency devices must be susceptible with the interference from legal communications or
ISM radio wave radiated devices.
DON’T aempt to remove the rechargeable lithium-ion baery from this product. Contact your local Bose
retailer or other qualified professional for removal.
Please dispose of used baeries properly, following local regulations. Do not incinerate.
R-R-Bos-440108
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REGULATORY AND LEGAL INFORMATION
Names and Contents of Toxic or Hazardous Substances or Elements
Toxic or Hazardous Substances and Elements
Part Name
Lead
(Pb)
Mercury
(Hg)
Cadmium
(Cd)
Hexavalent
(CR(VI))
Polybrominated
Biphenyl
(PBB)
Polybrominated
diphenylether
(PBDE)
PCBs X O O O O O
Metal Parts X O O O O O
Plastic Parts O O O O O O
Speakers X O O O O O
Cables X O O O O O
This table is prepared in accordance with the provisions of SJ/T 11364.
O: Indicates that this toxic or hazardous substance contained in all of the homogeneous materials for
this part is below the limit requirement of GB/T 26572.
X: Indicates that this toxic or hazardous substance contained in at least one of the homogeneous
materials used for this part is above the limit requirement of GB/T 26572.
Equipment name: Headphones Type designation: 440108
Restricted substances and its chemical symbols
Unit
Lead
(Pb)
Mercury
(Hg)
Cadmium (Cd)
Hexavalent
chromium
(Cr+6)
Polybrominated
biphenyls (PBB)
Polybrominated
diphenyl ethers
(PBDE)
PCBs -
b b b b b
Metal Parts -
b b b b b
Plastic Parts
b b b b b b
Speakers -
b b b b b
Cables -
b b b b b
Note 1: “b” indicates that the percentage content of the restricted substance does not exceed the percentage of reference
value of presence.
Note 2: The “−” indicates that the restricted substance corresponds to the exemption.
Date of Manufacture: The eighth digit in the serial number indicates the year of manufacture; “3” is 2013
or 2023.
Importers: Bose Electronics (Shanghai) Company Limited, Level 6, Tower D, No. 2337 Gudai Rd. Minhang
District, Shanghai 201100 | Bose Products B.V., Gorslaan 60, 1441 RG Purmerend, The Netherlands | Bose de
México S. de R.L. de C.V., Avenida Prado Sur #150, Piso 2, Interior 222 y 223, Colonia Lomas de Chapultepec V
Sección, Miguel Hidalgo, Ciudad de México, C.P. 11000 Phone Number: +5255 (5202) 3545 | Bose Limited (H.K.),
9F., No.10, Sec. 3, Minsheng E. Road, Zhongshan Dist. Taipei City 10480, Phone Number: +886-2-2514 7676 |
Bose Limited, Bose House, Quayside Chatham Maritime, Chatham, Kent, ME4 4QZ, United Kingdom
Input Rating: 5V p 0.5A | Charging Temperature Range: 32° F to 113° F (0° C to 45° C) |
Discharging Temperature Range: -4° F to 140° F (-20° C to 60° C)
The CMIIT ID is located inside the earcup under the scrim.
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REGULATORY AND LEGAL INFORMATION
The Bose Terms of Use apply to this product: worldwide.Bose.com/termsofuseworldwide.Bose.com/termsofuse
License Disclosures: To view the license disclosures that apply to the third-party software packages included
as components of the Bose QuietComfort Ultra Headphones, use the Bose app. You can access this
information from the Seings menu.
Apple, the Apple logo, iPad, iPhone, and macOS are trademarks of Apple Inc., registered in the U.S. and other
countries. App Store is a service mark of Apple Inc. The trademark “iPhone” is used in Japan with a license from
Aiphone K.K.
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.
The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of
such marks by Bose Corporation is under license.
Google, Android, and Google Play are trademarks of Google LLC.
Miscrosoft Teams is a trademark of the Microsoft group of companies.
Snapdragon Sound is a product of Qualcomm Technologies, Inc. and/or its subsidiaries. Qualcomm,
Snapdragon and Snapdragon Sound are trademarks or registered trademarks of Qualcomm Incorporated.
This product incorporates Spotify software which is subject to third-party licenses found here:
www.spotify.com/connect/third-party-licenseswww.spotify.com/connect/third-party-licenses
Spotify is a registered trademark of Spotify AB.
USB Type-C® and USB-C® are registered trademarks of USB Implementers Forum.
Bose, the B logo, QuietComfort, and SimpleSync are trademarks of Bose Corporation. | Bose Corporation
Headquarters: 1-877-230-5639 | ©2024 Bose Corporation. No part of this work may be reproduced, modified,
distributed, or otherwise used without prior wrien permission.
Please complete and retain for your records
The serial and model numbers are located inside the earcup under the scrim.
Serial number: ___________________________________________________________________________
Model number: 440108
Please keep your receipt. Now is a good time to register your Bose product. You can easily do this by going to
worldwide.Bose.com/ProductRegistrationworldwide.Bose.com/ProductRegistration
CONTENTS
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CONTENTS
WHAT’S IN THE BOX
Contents ............................................................................................................................................................................. 11
BOSE APP
Download the Bose app ............................................................................................................................................... 12
HEADPHONE CONTROLS
Power on ............................................................................................................................................................................. 14
Power o ............................................................................................................................................................................. 15
Auto-o .................................................................................................................................................................... 15
Media playback and volume ....................................................................................................................................... 16
Phone calls ......................................................................................................................................................................... 17
Modes................................................................................................................................................................................... 18
Immersive audio seings ............................................................................................................................................. 18
Mobile device voice control ........................................................................................................................................ 18
SHORTCUTS
Enable your shortcut ..................................................................................................................................................... 19
Use your shortcut ............................................................................................................................................................ 19
Change or disable your shortcut .............................................................................................................................. 19
ON-HEAD DETECTION
Auto play/pause ............................................................................................................................................................... 20
Auto answer call .............................................................................................................................................................. 20
NOISE CANCELLATION
Change the noise cancellation seing .................................................................................................................. 21
Noise cancellation while on a call ............................................................................................................................ 21
Use noise cancellation only ........................................................................................................................................ 21
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CONTENTS
IMMERSIVE AUDIO
Immersive audio seings ............................................................................................................................................. 22
Change the immersive audio seing ...................................................................................................................... 23
Change the mode ................................................................................................................................................ 23
Use your shortcut ................................................................................................................................................. 23
Immersive audio while on a phone call .................................................................................................................. 24
LISTENING MODES
Modes................................................................................................................................................................................... 25
Aware mode with ActiveSense ....................................................................................................................... 25
Change the mode ........................................................................................................................................................... 26
Add or remove modes from the headphones .......................................................................................... 26
BLUETOOTH® CONNECTIONS
Connect using the Bose app ...................................................................................................................................... 27
Connect using the Bluetooth menu on your mobile device ......................................................................... 27
Disconnect a mobile device ....................................................................................................................................... 28
Reconnect a mobile device ........................................................................................................................................ 28
Connect another mobile device ............................................................................................................................... 29
Switch between two connected mobile devices .............................................................................................. 29
Reconnect a previously-connected device ......................................................................................................... 30
Clear the headphone device list ............................................................................................................................... 30
Android™ devices only ................................................................................................................................................. 31
Connect using Fast Pair .................................................................................................................................... 31
Snapdragon Sound™ technology .................................................................................................................. 32
WIRED CONNECTIONS
Connect the audio cable ............................................................................................................................................. 33
Connect the USB cable ................................................................................................................................................ 34
CONTENTS
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CONTENTS
BATTERY
Charge the headphones ............................................................................................................................................... 35
Charging time ........................................................................................................................................................ 36
Hear the baery level.......................................................................................................................................... 36
HEADPHONE STATUS
Bluetooth status ............................................................................................................................................................. 37
Baery status ................................................................................................................................................................... 38
Power and charging status ........................................................................................................................................ 38
Update and error status .............................................................................................................................................. 38
CONNECT BOSE PRODUCTS
Connect to a Bose Smart Speaker or Soundbar ................................................................................................ 39
Benefits .................................................................................................................................................................... 39
Compatible products .......................................................................................................................................... 39
Connect using the Bose app ........................................................................................................................... 40
Connect using the product controls ............................................................................................................ 41
Reconnect to a Bose Smart Speaker or Soundbar ........................................................................................... 41
CARE AND MAINTENANCE
Store the headphones .................................................................................................................................................. 42
Update the headphones .............................................................................................................................................. 44
Clean the headphones.................................................................................................................................................. 44
Replacement parts and accessories ...................................................................................................................... 44
Limited warranty .............................................................................................................................................................. 44
Serial number location .................................................................................................................................................. 45
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CONTENTS
TROUBLESHOOTING
Try these solutions first ................................................................................................................................................. 47
Other solutions................................................................................................................................................................. 47
Reset the headphones .................................................................................................................................................. 55
Restore the headphones to factory seings ....................................................................................................... 56
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WHAT’S IN THE BOX
CONTENTS
Confirm that the following parts are included:
Bose QuietComfort Ultra Headphones
Carry case
USB Type-A to USB Type-C® cable 3.5 mm to 2.5 mm audio cable
NOTE: If any part of your product appears to be missing or damaged, don’t use it.
Visit support.Bose.com/QCUsupport.Bose.com/QCU for troubleshooting articles, videos, and product
repair or replacement.
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BOSE APP
The Bose app lets you set up and control the headphones from any mobile device,
such as a smartphone or tablet.
Using the app, you can manage Bluetooth connections, manage headphone seings,
adjust the audio, choose your voice prompt language, and get any future updates and
new features made available by Bose.
NOTE: If you’ve already downloaded the Bose app for another Bose product, you can
add the headphones from the main screen.
DOWNLOAD THE BOSE APP
1. On your mobile device, download the Bose app.
BOSE
2. Follow the app instructions.
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HEADPHONE CONTROLS
The headphone controls are located on the back of the right earcup.
Bluetooth/Power buon
Volume strip
Multi-function
buon
Status light
USB-C®
port
2.5 mm audio port
Microphone
Microphone
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HEADPHONE CONTROLS
POWER ON
Press and release the Bluetooth/Power buon.
After a few seconds, you hear a tone, and a voice prompt announces the baery level.
The status light glows according to the current charge level (see page 38).
NOTES:
• When you power on the headphones and hear the tone, the audio is personalized to
your ears for the best audio performance.
• The headphones must be on your head for the tone and voice prompt to play.
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HEADPHONE CONTROLS
POWER OFF
Press and hold the Bluetooth/Power buon until you hear a tone and the status light
blinks white twice.
NOTE: When the headphones are powered o, noise cancellation is disabled.
Auto-off
The headphones conserve the baery and go to sleep when you remove them from
your head and they aren’t in use for 10 minutes. To wake the headphones, press and
release the Bluetooth/Power buon or place them on your head.
The headphones power o after 24 hours of inactivity. To power on the headphones,
press and release the Bluetooth/Power buon.
NOTE: To change the auto-o seing, use the Bose app. You can access this option
from the Seings menu.
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HEADPHONE CONTROLS
MEDIA PLAYBACK AND VOLUME
The Multi-function buon controls media playback.
The volume strip controls the volume.
Multi-function buon
Volume strip
FUNCTION WHAT TO DO
Play/Pause Press the Multi-function buon.
Skip forward Double-press the Multi-function buon.
Skip backward Triple-press the Multi-function buon.
Volume up Swipe up on the volume strip.
Volume down Swipe down on the volume strip.
NOTE: To quickly increase or decrease the volume, use a long swipe on the
volume strip.
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HEADPHONE CONTROLS
PHONE CALLS
The Multi-function buon controls phone calls.
There are four microphones for phone calls on the headphones — two on the left
earcup and two on the right earcup.
Microphone
Multi-function
buon
Microphone
FUNCTION WHAT TO DO
Answer a call Press the Multi-function buon.
End/Decline an incoming call Double-press the Multi-function buon.
Answer a second incoming call
and put the current call on hold
While on a call and a second incoming call is ringing,
press the Multi-function buon.
Decline a second incoming call
and stay on current call
While on a call and a second incoming call is ringing,
double-press the Multi-function buon.
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MODES
The Multi-function buon allows you to quickly and easily switch between noise
cancellation seings by changing the mode.
For information about changing the mode, see page 25.
IMMERSIVE AUDIO SETTINGS
For information about changing the immersive audio seing, see page 23.
MOBILE DEVICE VOICE CONTROL
You can set a shortcut to access your mobile device voice control using the
headphones. The microphones on the headphones act as an extension of the
microphone on your mobile device.
For information about shortcuts, see page 19.
NOTE: You can’t access voice control while on a call.
HEADPHONE CONTROLS
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SHORTCUTS
A shortcut enables you to quickly and easily access one of the following functions:
• Cycle through immersive audio seings (see page 22)
• Access Spotify
• Use your mobile device voice control (see page 18)
• Access baery level (see page 36)
ENABLE YOUR SHORTCUT
To enable your shortcut, use the Bose app. To access this option, tap Shortcut on the
main screen.
USE YOUR SHORTCUT
Touch and hold the volume strip.
CHANGE OR DISABLE YOUR SHORTCUT
To change or disable your shortcut, use the Bose app. To access this option, tap
Shortcut on the main screen.
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ON-HEAD DETECTION
On-head detection uses sensors to identify when you’re wearing the headphones.
You can automatically play/pause audio and answer phone calls.
NOTE: To manage on-head detection features, use the Bose app. You can access this
option from the Seings menu.
AUTO PLAY/PAUSE
When you lift the right earcup o your ear or remove the headphones, audio pauses.
To resume audio, replace the right earcup or put on the headphones.
AUTO ANSWER CALL
You can answer phone calls by puing on the headphones.
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NOISE CANCELLATION
Noise cancellation reduces unwanted noise, providing a clearer, more lifelike
audio performance.
By default, the headphones power on in Quiet mode. Noise cancellation is fully
enabled (see page 25).
CHANGE THE NOISE CANCELLATION SETTING
You can switch between preset noise cancellation seings by changing the mode. For
information about modes, see page 25.
NOISE CANCELLATION WHILE ON A CALL
When you make or receive a call, the headphones remain at the current noise
cancellation seing and self voice is activated. Self voice helps you hear yourself
speak more naturally.
To adjust noise cancellation while on a call, change the mode (see page 26).
NOTE: To adjust self voice, use the Bose app. You can access this option from the
Seings menu.
USE NOISE CANCELLATION ONLY
You can use noise cancellation only, without audio or interruptions from phone calls.
1. Do one of the following:
• Disconnect your mobile device (see page 28).
• Turn the Bluetooth feature o on your mobile device.
2. Press and hold the Multi-function buon to change the mode (see page 26).
NOTE: To reconnect your mobile device, select the headphones from the Bluetooth
list on your device.
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IMMERSIVE AUDIO
Immersive audio takes what you’re hearing out of your head and places it in front of
you—like you’re always in the acoustic sweet spot. It feels like the sound is coming
from outside the headphones, resulting in a more natural listening experience.
Immersive audio works on any streaming content from any source, taking it to new
heights with beer sound clarity and richer sound quality.
NOTE: When you make or receive a phone call, immersive audio is temporarily set
to O (see page 24).
IMMERSIVE AUDIO SETTINGS
SETTING DESCRIPTION WHEN TO USE
Motion
Audio sounds like it's coming from two
stereo speakers in front of you that
follow the movements of your head.
NOTE: This seing is used by default
in Immersion mode.
Use for the most consistent
experience. Best for when you’re
doing activities that require you
to frequently turn your head or
look down.
Still
Audio sounds like it's coming from two
stereo speakers in front of you that
stay where they are when you move
your head.
NOTES:
• A few seconds after you stop moving
your head, the speakers recenter on
your position.
• To access this option, use the Bose
app. Tap Immersive Audio on the
main screen.
Use for the most realistic and
powerful experience. Best for
when you’re stationary.
Off
Audio sounds like it's coming from
your headphones.
Use when you want a classic
listening experience or want to
conserve baery life.
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IMMERSIVE AUDIO
CHANGE THE IMMERSIVE AUDIO SETTING
You can change the immersive audio seing by changing the mode or using a
shortcut to cycle through immersive audio seings.
TIP: You can also change the immersive audio seing using the Bose app. To access
this option, tap Immersive Audio on the main screen.
Change the mode
For information about changing the mode, see page 26.
NOTES:
• Changing the mode changes both the immersive audio and noise
cancellation seings.
• You can also create a custom mode with your preferred immersive audio and noise
cancellation seing (see page 25).
Use your shortcut
You can use your shortcut to cycle through immersive audio seings without
aecting your current mode’s noise cancellation seing. This temporarily customizes
the current mode until you power the headphones o or change the mode.
NOTE: To change the immersive audio seing using the headphones, it must be set
as a shortcut (see page 19).
1. Touch and hold the volume strip.
A voice prompt announces each immersive audio seing in a loop.
2. When you hear the name of your preferred seing, release the volume strip.
IMMERSIVE AUDIO
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IMMERSIVE AUDIO
IMMERSIVE AUDIO WHILE ON A PHONE CALL
When you make or receive a phone call, immersive audio is temporarily set to O.
When you end the call, the headphones return to the previous immersive
audio seing.
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LISTENING MODES
Listening modes are preset audio seings that you can switch between based on
your listening preferences and environment. They consist of noise cancellation and
immersive audio seings.
You can choose between three pre-configured modes — Quiet, Aware, or Immersion
— or create up to seven of your own custom modes.
MODES
MODE DESCRIPTION
Quiet
Full noise cancellation with Bose-optimized stereo audio. Allows you to
block out distractions using the highest level of noise cancellation.
Aware
Full transparency with Bose-optimized stereo audio. Allows you to hear
your surroundings while enjoying your audio in stereo.
Immersion
Full noise cancellation with immersive audio set to Motion. Allows you to
block out distractions and immerse yourself in lifelike audio.
Custom
Custom noise control (noise cancellation or wind block) and immersive
audio seings based on your listening preferences and environment.
NOTE: You can create up to seven custom modes using the Bose app.
To access this option, tap Modes on the main screen.
NOTES:
• By default, the headphones power on in Quiet mode. To set the headphones to
power on with the last mode used, use the Bose app. You can access this option
from the Seings menu.
• For information about noise cancellation and immersive audio seings, see page
21 and page 22.
Aware mode with ActiveSense
The dynamic noise cancellation of Aware mode with ActiveSense technology allows
you to hear your surroundings while reducing unwanted noise.
Aware mode with ActiveSense allows the headphones to automatically increase noise
cancellation when sudden or loud noises occur near you, so you can maintain
awareness without intermient noise interrupting your audio. Once the noise stops,
noise cancellation automatically returns the previous seing.
To enable ActiveSense, use the Bose app. To access this option, on the main screen,
tap Modes > Aware > .
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LISTENING MODES
CHANGE THE MODE
NOTE: To access a mode on the headphones, it must be set as a favorite in the Bose
app. To set your favorite modes, tap Modes on the main screen.
1. To cycle through modes, press and hold the Multi-function buon.
A voice prompt announces each mode in a loop.
2. When you hear the name of your preferred mode, release the
Multi-function buon.
TIP: You can also change the mode using the Bose app. To access this option, tap
Modes on the main screen.
Add or remove modes from the headphones
To access modes on the headphones, they must be set as favorites in the Bose app.
By default, Quiet, Aware, and Immersion modes are set as favorites.
To add or remove modes from the headphones, tap Modes on the main screen and
customize which modes are set as your favorites.
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BLUETOOTH CONNECTIONS
You can connect the headphones to your mobile device using the Bose app, the
Bluetooth menu on your mobile device, or Fast Pair (Android devices only).
You can store up to six devices in the headphone device list, and the headphones can
be actively connected to up to two devices at a time (multi-point connection). You
can play audio from only one device at a time.
NOTES:
• For the best experience, use the Bose app to set up and connect your mobile
device (see page 12).
• For information about connecting using Fast Pair, see page 31.
CONNECT USING THE BOSE APP
To connect the headphones and manage Bluetooth seings using the Bose app, see
page 12.
CONNECT USING THE BLUETOOTH MENU ON YOUR
MOBILE DEVICE
1. With the headphones powered on, press and hold the Bluetooth/Power buon.
You hear the power o tone and the status light blinks white twice. Continue
holding until you hear “Ready to connect” and the status light blinks blue.
NOTE: You can also tap the buon on the notification to download the Bose app
and finish seing up the headphones.
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BLUETOOTH CONNECTIONS
2. On your device, enable the Bluetooth feature.
NOTE: The Bluetooth feature is usually found in the Seings menu.
3. Select your headphones from the device list.
NOTE: Look for the name you entered for your headphones in the Bose app. If you
didn’t name your headphones, the default name appears.
Bose QC Ultra Headphones
Once connected, the status light glows solid blue for 10 seconds.
NOTE: If a device is already connected, you hear “Connected to <device name>”
and then the status light glows solid blue for 10 seconds.
DISCONNECT A MOBILE DEVICE
To disconnect a mobile device, use the Bose app.
TIP: You can also use Bluetooth seings on your mobile device to disconnect.
Disabling the Bluetooth feature disconnects all other devices.
RECONNECT A MOBILE DEVICE
When powered on, the headphones try to reconnect with the two most
recently-connected devices.
NOTES:
• The devices must be within range (30 ft or 9 m) and powered on.
• Make sure the Bluetooth feature is enabled on your mobile device.
• If the multi-point connection feature is disabled, the headphones try to reconnect
with the most recently-connected device.
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BLUETOOTH CONNECTIONS
CONNECT ANOTHER MOBILE DEVICE
By default, the headphones can be actively connected to up to two devices at a time
(multi-point connection).
To connect another device, connect using the Bose app (see page 12), the
Bluetooth menu on your mobile device (see page 27), or Fast Pair (Android devices
only) (see page 31).
NOTES:
• You can only play audio from one device at a time.
• To manage or disable the multi-point connection feature, use the Bose app.
You can access this option from the Seings menu.
• Disabling the multi-point connection feature disconnects the second
connected device.
SWITCH BETWEEN TWO CONNECTED MOBILE DEVICES
1. Press and release the Bluetooth/Power buon to hear the name of the first
connected device.
2. Within 2 seconds, press and release the Bluetooth/Power buon again to hear
the name of the second connected device.
The headphones switch to that device’s audio stream.
TIP: You can also switch between two connected devices by pausing audio on the
first device and playing audio on the second device.
NOTE: Your headphones receive phone calls from both devices, regardless of which
device is playing audio.
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BLUETOOTH CONNECTIONS
RECONNECT A PREVIOUSLY-CONNECTED DEVICE
1. Press the Bluetooth/Power buon and release to hear the name of the first
connected device.
2. Within 2 seconds, press the Bluetooth/Power buon and release again to hear the
name of the next device in the headphone device list.
3. Repeat until you hear the correct device name.
You hear a tone that indicates when the device is connected.
TIP: You can also reconnect a previously-connected device using the Bose app (see
page 12).
NOTE: If two devices are already connected to the headphones, the
newly-connected device replaces the older of the two connections.
CLEAR THE HEADPHONE DEVICE LIST
1. Press and hold the Bluetooth/Power buon and Multi-function buon
simultaneously until you hear “Bluetooth device list cleared. Ready to connect.”
2. Delete your headphones from the Bluetooth list on your mobile device.
All devices are cleared, and the headphones are ready to connect.
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BLUETOOTH CONNECTIONS
ANDROID DEVICES ONLY
If you have an Android mobile device, you can access the following additional
connection features.
Connect using Fast Pair
In one tap, the headphones enable quick, eortless Bluetooth pairing with your
Android devices.
NOTES:
• To use Fast Pair, you need an Android device running Android 6.0 or higher.
• Your Android device must have the Bluetooth and Location features enabled.
1. With the headphones powered on, press and hold the Bluetooth/Power buon.
You hear the power o tone and the status light blinks white twice. Continue
holding until you hear “Ready to connect” and the status light blinks blue.
2. Place your headphones next to your Android device.
A notification displays on your device prompting you to pair the headphones.
NOTE: If you don’t see a notification, check that notifications are enabled for the
Google Play Services app on your device.
3. Tap the notification.
NOTE: You can also tap the buon on the notification to download the Bose app
and finish seing up the headphones.
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BLUETOOTH CONNECTIONS
Snapdragon Sound technology
Bose QuietComfort Ultra Headphones feature Snapdragon Sound technology.
Snapdragon Sound optimizes Qualcomm® audio technologies across connected
devices to ensure the best sound quality, connection stability, and latency for your
streaming audio.
To experience Snapdragon Sound, you need a Snapdragon Sound-certified device,
such as a compatible Android mobile device. Once you connect the headphones, your
device will automatically stream audio using the aptX Adaptive Bluetooth codec.
NOTE: To see which Snapdragon Sound features the headphones support and check
if your device is compatible, visit: support.Bose.com/QCUsupport.Bose.com/QCU
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WIRED CONNECTIONS
CONNECT THE AUDIO CABLE
Use the 2.5 mm to 3.5 mm audio cable to listen to audio from your source device
when a Bluetooth connection isn’t available.
NOTES:
• The headphones must be powered on for you to use the audio cable. If the baery
is depleted, use the USB cable to connect to an external power source, then power
on the headphones (see page 34).
• Phone calls and media playback controls are disabled and must be controlled on
your source device.
• Bluetooth connection and microphone voice pick-up on the earcups are disabled.
• For the best experience, a Bluetooth connection is recommended.
1. Connect the cable to the 2.5 mm port on the left earcup.
2. Connect the other end of the cable to the 3.5 mm port on your source device.
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WIRED CONNECTIONS
CONNECT THE USB CABLE
If the headphone baery is depleted, you can use the USB cable to connect to an
external power source and still use the headphones.
NOTES:
• If powered on, the headphones power o and begin to charge when connected to
an external power source. To continue using the headphones, power them on again
(see page 14).
• The headphones won’t charge while they’re powered on.
• The headphones don’t support USB audio. To play audio from a source device
connected as an external power source, connect using the Bluetooth menu on your
device (see page 27) or the audio cable (see page 33).
• To continue listening to audio on your source device when the headphone baery
is depleted and a Bluetooth connection isn’t available, connect both the USB cable
and the audio cable (see page 33).
1. Connect the small end of the USB cable to the USB-C port on the left earcup.
2. Connect the other end to a USB-A power source such as a computer or
wall charger.
If powered on, the headphones power o and begin to charge.
3. Power on the headphones (see page 14).
BATTERY
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BATTERY
CHARGE THE HEADPHONES
1. Connect the small end of the USB cable to the USB-C port on the left earcup.
2. Connect the other end to a USB-A power source such as a computer or
wall charger.
The headphones begin charging, and the status light glows solid amber. When the
headphones are fully charged, the status light glows solid white.
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BATTERY
Charging time
Allow up to 3 hours to fully charge the headphones.
1
A full charge powers the
headphones for up to 24 hours with immersive audio set to O (up to 18 hours with
immersive audio set to On).
2
When the headphone baery level is low, a 15-minute charge powers the headphones
for up to 2.5 hours with immersive audio set to O (up to 2 hours with immersive
audio set to On).
3
Hear the battery level
Each time you power on the headphones, a voice prompt announces the baery level.
When the headphone baery is low, you hear “Baery low.”
NOTE: To visually check the baery, see the status light l ocated on the left earcup.
For more information, see page 36.
TIP: You can also hear the baery level using a shortcut. The baery level must be set
as a shortcut using the Bose app (see page 19).
1 Testing conducted by Bose in June 2023 using production-representative Bose QuietComfort Ultra Headphones. Quick
charge testing consisted of charging headphones with baery depleted (to the point of no audio playback) for 15 minutes,
then resuming audio playback with volume set to playback loudness of 75dBSPL, 3-band EQ set to zero, in Quiet Mode
(full noise cancellation) with Immersive Audio switched o, resulting in up to 2.5 hours playback time before baery
depletion. With Immersive Audio on, playback time was up to 2 hours before baery depletion. Time to achieve fully charged
headphones was determined by charging headphones with baery depleted (to the point of no audio playback) to 100%
baery charge. Baery life varies based on seings and usage.
2 Testing conducted by Bose in June 2023 using production-representative Bose QuietComfort Ultra Headphones and a variety
of music tracks using A2DP Bluetooth audio streaming. Volume set to playback loudness of 75dBSPL, 3-band EQ set to zero,
in Quiet Mode (full noise cancellation). With Immersive Audio o, playback time was up to 24 hours before baery depletion.
With Immersive Audio on, playback time was up to 18 hours before baery depletion. Baery life varies based on seings
and usage.
3 See 1.
BATTERY
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HEADPHONE STATUS
The status light is located on the left earcup.
When you place the headphones on your head or remove the headphones, the status
light glows according to headphone status for 5 seconds.
NOTES:
• When the headphones are on your head, the status light remains o until you press
the Bluetooth/Power buon.
• When the headphones aren’t on your head, the status light remains o until you
use the headphone controls or move the headphones.
BLUETOOTH STATUS
Shows the Bluetooth connection status.
LIGHT ACTIVITY SYSTEM STATE
Blinking blue Ready to connect
Solid blue (5 seconds) Connected
Blinks white 2 times Device list cleared
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HEADPHONE STATUS
BATTERY STATUS
Shows the baery status.
LIGHT ACTIVITY SYSTEM STATE
Solid white Full charge
Solid amber Low to medium charge
TIP: You can also check the baery level using the Bose app or hear the baery level
using a shortcut. The baery level must be set as a shortcut using the Bose app
(see page 19).
POWER AND CHARGING STATUS
Shows the power and charging status.
LIGHT ACTIVITY SYSTEM STATE
Blinks white 2 times Power o
Solid amber Charging
Solid white Full charge
UPDATE AND ERROR STATUS
Shows the update and error status.
LIGHT ACTIVITY SYSTEM STATE
Blinks white 3 times (repeated) Updating software (wirelessly)
Fast blinking white (10 seconds) Updating software (via USB)
Blinks white (3 seconds) Reset
Blinks white (30 seconds), then blinks
amber (2 to 3 seconds)
Restore
Blinking amber and white Error - contact Bose customer service
BATTERY
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CONNECT BOSE PRODUCTS
CONNECT TO A BOSE SMART SPEAKER OR SOUNDBAR
Using SimpleSync technology, you can connect the headphones to a Bose Smart
Soundbar or Bose Smart Speaker for a personal listening experience.
Benefits
• Use independent volume controls on each product to lower or mute your Bose
Smart Soundbar while keeping the headphones as loud as you like.
• Hear your music clearly from the next room by connecting the headphones to your
Bose Smart Speaker.
NOTE: SimpleSync technology has a Bluetooth range of up to 30 ft (9 m). Walls and
construction materials can aect reception.
Compatible products
You can connect the headphones to any Bose Smart Speaker or
Bose Smart Soundbar.
Popular compatible products include:
• Bose Smart Soundbar 900
• Bose Smart Soundbar 700/Bose Soundbar 700
• Bose Smart Soundbar 600
• Bose Soundbar 500
• Bose Smart Speaker 500/Bose Home Speaker 500
• Bose Home Speaker 300
• Bose Portable Smart Speaker/Bose Portable Home Speaker
New products are added periodically. For a complete list and more information, visit:
support.Bose.com/Groupssupport.Bose.com/Groups
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CONNECT BOSE PRODUCTS
Connect using the Bose app
1. With the headphones powered on, press and hold the Bluetooth/Power buon.
You hear the power o tone and the status light blinks white twice. Continue
holding until you hear “Ready to connect another device” and the status light
blinks blue.
2. Use the Bose app to connect the headphones to a compatible Bose product.
For more information, visit: support.Bose.com/Groupssupport.Bose.com/Groups
NOTES:
• It could take up to 30 seconds to connect.
• Make sure that the headphones are within 30 ft (9 m) of your soundbar or speaker.
• You can connect the headphones to only one product at a time.
BATTERY
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CONNECT BOSE PRODUCTS
Connect using the product controls
1. With the headphones powered on, press and hold the Bluetooth/Power buon.
You hear the power o tone and the status light blinks white twice. Continue
holding until you hear “Ready to connect another device” and the status light
blinks blue.
2. On your soundbar remote or the top of your speaker, press and hold the Bluetooth
buon until the light bar or light ring pulses blue.
The headphones connect to your soundbar or speaker, and you hear the same
audio through both devices.
NOTES:
• It could take up to 30 seconds to connect.
• Make sure that the headphones are within 30 ft (9 m) of your soundbar or speaker.
RECONNECT TO A BOSE SMART SPEAKER
OR SOUNDBAR
Use the Bose app to reconnect the headphones to a previously-connected
compatible Bose product. For more information, visit: support.Bose.com/Groupssupport.Bose.com/Groups
NOTES:
• Your soundbar or speaker must be within range (30 ft or 9 m) and powered on.
• If the headphones don’t reconnect, see “Headphones don’t reconnect to a
previously-connected Bose Smart Soundbar
or Speaker” on page 54.
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CARE AND MAINTENANCE
STORE THE HEADPHONES
The earcups rotate for easy, convenient storage. Place the headphones flat into
the case.
1. Place your hands around each earcup.
Left earcup Right earcup
2. Rotate both earcups inward so they lay flat.
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CARE AND MAINTENANCE
3. Slide the earcups up into the headband.
4. Fold the left earcup up toward the headband and place the headphones in
the case.
NOTE: Before storing the headphones for more than a few months, make sure the
baery is fully charged.
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CARE AND MAINTENANCE
UPDATE THE HEADPHONES
The headphones begin updating automatically when connected to the Bose app and
an update is available. Follow the app instructions.
You can also update the headphones using the Bose updater website. On your
computer, visit: btu.Bose.combtu.Bose.com and follow the on-screen instructions.
CLEAN THE HEADPHONES
The headphones may require periodic cleaning. If the headband or other exterior
surfaces need to be cleaned, gently wipe with a slightly damp cloth.
• Use only a water dampened cloth. Don’t use cleaning products. Don’t allow any
moisture to enter the headphones through the ports or earcups.
• Don’t force any dirt or debris into the ports. Don’t blow air into or vacuum the ports
or the interior of the earcups.
REPLACEMENT PARTS AND ACCESSORIES
Replacement parts and accessories can be ordered through Bose customer service.
Visit: support.Bose.com/QCUsupport.Bose.com/QCU
LIMITED WARRANTY
Your headphones are covered by a limited warranty. Visit our website at
worldwide.Bose.com/Warrantyworldwide.Bose.com/Warranty for details of the limited warranty.
To register your product, visit worldwide.Bose.com/ProductRegistrationworldwide.Bose.com/ProductRegistration for
instructions. Failure to register will not aect your limited warranty rights.
BATTERY
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CARE AND MAINTENANCE
SERIAL NUMBER LOCATION
The serial number is located inside the left earcup under the scrim. The scrim is the
inner screen that covers and protects the components inside the earcup.
1. On the left earcup, gently pull one area of the cushion away from the earcup until
all six tabs around the inside rim of the earcup release.
2. Grab the scrim at the top edge and gently peel it away to view the serial number.
CAUTION: Be careful not to press down on or remove any other components
inside the earcup as this could damage the headphones.
012345Z03650001AE
012345Z03650001AE
Scrim
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CARE AND MAINTENANCE
3. Secure the scrim back in place.
4. Align the six tabs on the cushion mounting flange with the six slots on the earcup,
then press the cushion until all six tabs snap into each slot. You will hear and feel a
snap when the cushion is properly in place.
CAUTION: To ensure proper audio performance, all six tabs must be secure on
the cushion.
BATTERY
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TROUBLESHOOTING
TRY THESE SOLUTIONS FIRST
If you experience problems with your headphones:
• Charge the headphones (see page 35).
• Power on the headphones (see page 14).
• Check the headphones status light (see page 37).
• Make sure your mobile device supports Bluetooth connections (see page 27).
• Move your mobile device closer to the headphones (30 ft or 9 m) and away from
any interference or obstructions.
• Increase the volume on the headphones, your mobile device, and the music app.
• Connect another mobile device (see page 28).
If you couldn’t resolve your issue, see the table below to identify symptoms and
solutions to common problems. You can also access troubleshooting articles, videos,
and other resources at: support.Bose.com/QCUsupport.Bose.com/QCU
If you are unable to resolve your issue, contact Bose customer service.
Visit: worldwide.Bose.com/contactworldwide.Bose.com/contact
OTHER SOLUTIONS
SYMPTOM SOLUTION
Headphones don’t
power on
Press and release the Bluetooth/Power buon (see page 14).
After a few seconds, you hear a tone, and a voice prompt
announces the baery level. The status light glows according to
the current charge level (see page 38).
If your headphones have been exposed to high or low
temperatures, let the headphones return to room temperature.
Headphones don’t
connect with
mobile device
Disconnect the audio cable (see page 33).
Connect using the Bluetooth menu on your mobile device
(see page 27).
Disable the Bluetooth feature on your mobile device,
then re-enable.
Clear the headphone device list (see page 30). Delete the
headphones from the Bluetooth list on your mobile device,
including any duplicate listings labeled LE (Low Energy).
Connect again (see page 27).
Visit support.Bose.com/QCUsupport.Bose.com/QCU to see how-to videos.
Reset the headphones (see page 55).
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TROUBLESHOOTING
SYMPTOM SOLUTION
Headphones don’t
reconnect with macOS
Reconnect the headphones using the Bluetooth menu on
your computer.
Use the Bose app to select your headphones. On the main
screen, tap Source, then use the Paired Devices list to reconnect
your headphones to your computer.
Press the Bluetooth/Power buon on the headphones to hear
which devices are connected. Immediately press the
Bluetooth/Power buon again to hear the name of the next
device in the headphone device list. Repeat until you hear the
name of your computer. A tone plays when your computer
is connected.
Disable the Bluetooth feature on any other devices that the
headphones are paired with. Restart the headphones to connect
to your computer.
Headphones don’t
respond during
app setup
Close and re-open the Bose app on your mobile device, then
try again.
Make sure you’re using the Bose app for setup (see page 12).
Make sure you have given the Bose app access to Bluetooth
connections in your mobile device Seings menu.
Make sure the Bluetooth feature is on in your mobile device
Seings menu.
Uninstall the Bose app on your mobile device. Reinstall the app
(see page 12).
Bose app can’t find
headphones
Close and re-open the Bose app on your mobile device, then
try again.
Make sure you have given the Bose app access to Bluetooth
connections in your mobile device Seings menu.
With the headphones powered on, press and hold the Bluetooth/
Power buon until the status light blinks blue.
Clear the headphone device list (see page 30). Delete the
headphones from the Bluetooth list on your mobile device,
including any duplicate listings labeled LE (Low Energy).
Connect again (see page 27).
If the headphones were previously connected to a PC currently
running Microsoft Teams, quit the Microsoft Teams app. If this
does not resolve the issue, turn o Bluetooth on that PC or leave
its Bluetooth range (typically around 30 feet).
Uninstall the Bose app on your mobile device. Reinstall the app
(see page 12).
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TROUBLESHOOTING
SYMPTOM SOLUTION
Bose app doesn’t work
on mobile device
Make sure your mobile device is compatible with the Bose app
and meets minimum system requirements. For more
information, refer to the app store on your mobile device.
Uninstall the Bose app on your mobile device. Reinstall the app
(see page 12).
Headphones don’t
charge
Make sure both ends of the USB charging cable are securely
connected into the ports (see page 35).
Try a dierent USB-A wall charger, USB cable, or AC (mains)
power source.
If your headphones have been exposed to high or low
temperatures, let the headphones return to room temperature
and try charging again.
Intermittent
Bluetooth connection
Power your mobile device o and on, then try connecting again.
Clear the headphone device list (see page 30). Delete the
headphones from the Bluetooth list on your mobile device,
including any duplicate listings labeled LE (Low Energy).
Connect again (see page 27).
Reset the headphones (see page 55).
Spotify doesn’t play
on headphones
Ensure that Spotify is open on only a single connected device. If
you are logged in to the same Spotify account on multiple
connected devices, log out of or quit Spotify on one of them.
Can’t adjust
noise cancellation
Power o the headphones, then power on again (see page 14).
If using the Multi-function buon, try using the Bose app to
adjust the noise cancellation level.
Headphones don’t
detect they are on head
Power o the headphones. Put the headphones on, then power
on again (see page 14).
Make sure the right earcup is fully covering your ear.
Brush aside any hair or remove any clothing covering your right
ear before puing the headphones on. Hair or clothing can
prevent the headphones from detecting that they’re on
your head.
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TROUBLESHOOTING
SYMPTOM SOLUTION
Headphones don’t
detect they are off head
Power o the headphones. With the headphones o your head,
power on again (see page 14), then put the headphones on.
After taking the headphones o, rotate both earcups inwards so
they lay flat. You can also place them in the case.
Make sure that the auto play/pause on-head detection feature
is enabled using the Bose app (see page 20). You can access
this option from the Seings menu.
Audio pauses
unexpectedly
Remove the headphones, then put them on again.
Disable the auto play/pause on-head detection feature using the
Bose app (see page 20). You can access this option from the
Seings menu.
No sound
If the headphones have been exposed to high or low
temperatures, let the headphones return to room temperature.
Press the Bluetooth/Power buon to hear the connected device.
Make sure you are using the correct device.
Press play on your mobile device to make sure audio is playing.
Play audio from a dierent application or music service.
Play audio from content stored directly on your device.
If connected to a source device with the audio cable, see “No
sound from a source device connected by an audio cable” on
page 52.
If two mobile devices are connected, pause your other
device first.
Restart your mobile device.
If you’re trying to play audio from a source device connected
by a USB cable, connect using the Bluetooth menu on your
device (see page 27) or the audio cable (see page 33). The
headphones don’t support USB audio.
Reset the headphones (see page 55).
See “Headphones don’t detect they are o head.”
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TROUBLESHOOTING
SYMPTOM SOLUTION
Can’t adjust volume
Make sure your finger is making good contact with the
volume strip.
Make sure your fingers are dry.
If your hair is wet, make sure it isn’t interfering with the
volume strip.
If wearing gloves, remove them before touching the volume strip.
Poor sound quality
While wearing the headphones, power them o, then power on
again (see page 14). Make sure you listen for the tone so the
audio is personalized to your ears for the best
audio performance.
Power o the headphones, then power on again (see page 14).
If in a windy environment, create a custom mode with wind block
enabled in the Bose app. To access this option, tap Modes on the
main screen.
Make sure the earcups fit securely and form a comfortable seal
around your ears.
If your hair is long or if you’re wearing glasses or a hat, make sure
it isn’t interfering with the earcups.
Make sure you’re using the Bose app for setup (see page 12).
Play audio from a dierent application or music service.
Play audio from content stored directly on your device.
If two mobile devices are connected, disconnect the
second device.
Turn o any audio enhancement features on the device or
music app.
Change the immersive audio seing (see page 23).
Make sure your headphones are connected over the correct
Bluetooth profile: Stereo A2DP. Check your device’s Bluetooth/
audio seings menu to make sure the correct audio profile
is selected.
Disable the Bluetooth feature on your mobile device,
then re-enable.
Clear the headphone device list (see page 30). Delete the
headphones from the Bluetooth list on your mobile device,
including any duplicate listings labeled LE (Low Energy).
Connect again (see page 27).
Visit support.Bose.com/QCUsupport.Bose.com/QCU to see how-to videos.
Reset the headphones (see page 55).
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TROUBLESHOOTING
SYMPTOM SOLUTION
No sound from a source
device connected by an
audio cable
Make sure the headphones are powered on (see page 14).
The headphones don’t support passive audio, meaning that they
require power to use the audio cable. If the baery is depleted,
use the USB cable to connect to an external power source, then
power on the headphones (see page 34).
Make sure you’re using the Bose-provided audio cable.
Make sure both ends of the audio cable are securely connected
to the ports (see page 33).
Press play on your mobile device to make sure audio is playing.
Play audio from a dierent application or music service.
Play audio from content stored directly on your mobile device.
Increase the volume on the headphones, then increase the
volume on your mobile device.
Restart your mobile device.
Poor sound quality from
a mobile device
connected by an
audio cable
Make sure both ends of the audio cable are securely connected
to the ports (see page 33).
Restart your mobile device.
Microphone doesn’t
pick up sound
Make sure you are wearing the headphones correctly. The inner
scrims (cloth covers) of the headphone earcups are marked with
an L (left earcup) and R (right earcup). Match the right earcup
with your right ear and the left earcup with your left ear.
Make sure the microphones aren’t blocked and that they are free
of debris.
Clear the headphone device list (see page 30). Delete the
headphones from the Bluetooth list on your mobile device,
including any duplicate listings labeled LE (Low Energy). Connect
again (see page 27). Try another phone call.
Disable the Bluetooth feature on your mobile device,
then re-enable.
Multi-function button
doesn’t change
the mode
Use the Bose app to change the mode. To access this option,
tap Modes on the main screen.
BATTERY
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TROUBLESHOOTING
SYMPTOM SOLUTION
Poor noise cancellation
Power o the headphones, then power on again (see page 14).
Check the mode (see page 25).
Make sure the earcups fit securely and form a comfortable seal
around your ears.
If your hair is long or if you’re wearing glasses or a hat, make sure
it isn’t interfering with the earcups.
Remove the headphones from your head and place back on
your head.
If you’re on a phone call or using voice control on your mobile
device, lower or turn o self voice using the Bose app (see
page 21).
Check if ActiveSense is enabled (see page 25).
Reset the headphones (see page 55). If that doesn’t resolve
the issue, restore the headphones (see page 56).
Difficulty hearing a
caller while on a
phone call
Change the mode (see page 26).
Difficulty hearing own
voice while on a
phone call
Use the Bose app to adjust self voice. You can access this option
from the Seings menu.
Change the mode to Aware mode (see page 26).
Use the Bose app to create a custom mode for use during calls.
Experiment with dierent noise cancellation levels to see which
helps you hear your voice best. To access this option, tap Modes
on the main screen.
Headphones don’t
respond
Reset the headphones (see page 55). If that doesn’t resolve
the issue, restore the headphones (see page 56).
Voice prompt language
isn’t correct
Change the voice prompt language using the Bose app (see page
12). You can access this option from the Seings menu.
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TROUBLESHOOTING
SYMPTOM SOLUTION
Not receiving
call notifications
Check the Bluetooth menu on your mobile device to make sure
the headphones are connected.
Make sure your mobile device isn’t set to Do Not Disturb.
Make sure voice prompts are enabled using the Bose app (see
page 12). You can access this option from the Seings menu.
Make sure you have given the headphones access to your
contacts in your mobile device Bluetooth menu.
Headphones don’t
connect to a Bose
Smart Soundbar
or Speaker
Make sure you are connecting to a compatible Bose product. For
a list of compatible products, visit: support.Bose.com/Groupssupport.Bose.com/Groups
With the headphones powered on, press and hold the Bluetooth/
Power buon until you hear “Ready to connect another device”
and the status light blinks blue.
Make sure that the headphones are within 30 ft (9 m) of your
soundbar or speaker.
Headphones don’t
reconnect to a
previously-connected
Bose Smart Soundbar
or Speaker
On the headphones, press and hold the Bluetooth/Power buon
for 3 seconds until you hear “Ready to connect another device”
and the status light blinks blue. Use the Bose app to connect
the headphones to a compatible Bose product. For more
information, visit: support.Bose.com/Groupssupport.Bose.com/Groups
Delayed audio when
connected to a Bose
Smart Soundbar
or Speaker
Download the Bose app and run available software updates.
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TROUBLESHOOTING
RESET THE HEADPHONES
If the headphones are unresponsive, you can reset them.
Reseing the headphones resets the product controls and reboots the headphones.
It doesn’t clear any device seings.
1. Remove the headphones from the Bluetooth list on your device.
2. Connect the small end of the USB cable to the USB-C port on the left earcup.
3. Press and hold the Bluetooth/Power buon while connecting the other end of the
USB cable to a USB-A power source such as a computer or wall charger.
4. Once the USB cable is connected to a USB-A power source, release the
Bluetooth/Power buon.
When the reset is complete, the status light blinks white for 3 seconds, then glows
according to the current charge level (see page 38).
NOTE: If you’re unable to resolve your issue, additional troubleshooting and
support is available at: support.Bose.com/QCUsupport.Bose.com/QCU
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ENG
TROUBLESHOOTING
RESTORE THE HEADPHONES TO FACTORY SETTINGS
A restore to factory seings clears all seings and return the headphones to their
original out-of-box state. After, the headphones can be configured as if they were
being set up for the first time.
Restoring to factory seings is only recommended if you are having issues with the
headphones or you have been instructed to do so by Bose customer service.
1. Remove the headphones from the Bluetooth list on your device.
2. Remove the headphones from your Bose account using the Bose app.
NOTE: For more information about how to remove the headphones from your
Bose account using the Bose app, visit: support.Bose.com/QCUsupport.Bose.com/QCU
3. Press and hold the Bluetooth/Power buon and Multi-function buon
simultaneously. After a few seconds, the status light blinks white twice then blinks
blue. Continue holding both buons for 15 seconds in total until the status light
blinks white twice again.
When the restore is complete, the status light blinks blue. The headphones are
now in their original out-of-box state.
NOTE: If you’re unable to resolve your issue, additional troubleshooting and
support is available at: support.Bose.com/QCUsupport.Bose.com/QCU
©2024 Bose Corporation, 100 The Mountain Road, Framingham, MA 01701-9168 USA
AM884885-0010 Rev. 04
