Bose QUIETCOMFORT 45 User manual

CONTENTS
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WHAT’S IN THE BOX
Contents ............................................................................................................................. 13
BOSE MUSIC APP
Download the Bose Music app.................................................................................. 14
Add the headphones to an existing account....................................................... 14
HEADPHONE CONTROLS
Power on ............................................................................................................................ 16
Standby timer .......................................................................................................... 16
Power o............................................................................................................................ 17
Headphone functions.................................................................................................... 18
Media playback and volume............................................................................... 18
Phone calls ................................................................................................................ 19
Action button ........................................................................................................... 20
NOISE CANCELLATION
Noise cancelling modes................................................................................................ 21
Change the noise cancelling mode.......................................................................... 21
VOICE CONTROL
Access voice control...................................................................................................... 22
BLUETOOTH® CONNECTIONS
Connect using the Bluetooth menu on your mobile device .......................... 23
Disconnect a mobile device........................................................................................ 25
Reconnect a mobile device......................................................................................... 25
Connect another mobile device................................................................................ 25
Identify connected mobile devices.......................................................................... 25
Switch between two connected mobile devices................................................ 25
Reconnect a previously connected device........................................................... 26
Clear the headphone device list................................................................................ 26

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WIRED CONNECTIONS
Connect the audio cable.............................................................................................. 27
BATTERY
Charge the headphones............................................................................................... 28
Charging time........................................................................................................... 28
Hear the battery level ........................................................................................... 28
HEADPHONE STATUS
Bluetooth status ............................................................................................................. 29
Battery status .................................................................................................................. 29
Charging status .............................................................................................................. 30
Update and error status .............................................................................................. 30
CONNECT BOSE PRODUCTS
Connect a Bose Smart Speaker or Soundbar...................................................... 31
Benefits....................................................................................................................... 31
Compatible products ............................................................................................ 31
Connect using the Bose Music app ................................................................. 31
Reconnect to a Bose Smart Speaker or Soundbar............................................ 32
CARE AND MAINTENANCE
Store the headphones................................................................................................... 33
Clean the headphones .................................................................................................. 34
Replacement parts and accessories........................................................................ 34
Limited warranty............................................................................................................. 34
Serial number location.................................................................................................. 35

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TROUBLESHOOTING
Try these solutions first ................................................................................................ 36
Other solutions ................................................................................................................ 36
Restore the headphones to factory settings ....................................................... 39

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WHAT’S IN THE BOX
CONTENTS
Confirm that the following parts are included:
Bose QuietComfort 45 headphones Carry case
USB Type-C® cable 3.5 mm to 2.5 mm audio cable
NOTE: If any part of your product is damaged, do not use it. Contact your authorized
Bose dealer or Bose customer service.
Visit: worldwide.Bose.com/Support/QC45worldwide.Bose.com/Support/QC45

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BOSE MUSIC APP
The Bose Music 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 settings,
choose your voice prompt language, and access new features through updates.
NOTE: If you’ve already created a Bose Music account for another Bose product, add
the headphones to your existing account (see the bottom of page 14).
DOWNLOAD THE BOSE MUSIC APP
1. On your mobile device, download the Bose Music app.
BOSE MUSIC
2. Follow the app instructions.
ADD THE HEADPHONES TO AN EXISTING ACCOUNT
To add your Bose QuietComfort 45 headphones, open the Bose Music app and add
your headphones.

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HEADPHONE CONTROLS
Power/Bluetooth
switch
Volume down
Action button Multi-function button
2.5 mm audio cable port
USB-C® port
Volume up

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HEADPHONE CONTROLS
POWER ON
On the right earcup, slide the Power/Bluetooth switch to the right.
A voice prompt announces the battery level, and the status light glows according to
the current charge level (see page 29).
Standby timer
The standby timer conserves the battery when the headphones are not being used.
To set up and customize the standby timer, use the Bose Music app.

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HEADPHONE CONTROLS
POWER OFF
Slide the Power/Bluetooth switch to the left.
NOTE: When the headphones are powered o, noise cancellation is disabled.

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HEADPHONE CONTROLS
HEADPHONE FUNCTIONS
The headphone controls are located on the back of the right earcup.
Media playback and volume
Volume up
Multi-function button
Volume down
FUNCTION WHAT TO DO
Play/Pause Press the Multi-function button.
Skip forward Double-press the Multi-function button.
Skip backward Triple-press the Multi-function button.
Volume up Press H.
Volume down Press z.
NOTES:
• To quickly increase the volume, press and hold H.
• To quickly decrease the volume, press and hold z.

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HEADPHONE CONTROLS
Phone calls
The Multi-function button is located on the back of the right earcup. The microphone
is located near the front of the right earcup.
The Action button is located on the back of the left earcup.
Multi-function button
Microphone
FUNCTION WHAT TO DO
Answer/End a call Press the Multi-function button.
Decline an incoming call Press and hold the Multi-function button for 1 second.
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 button.
Decline a second incoming call
and stay on current call
While on a call and a second incoming call is ringing,
press and hold the Multi-function button for 1 second.
Switch between two calls While two calls are active, double-press the
Multi-function button.
Create a conference call While two calls are active, press and hold the
Multi-function button for 3 seconds.
Mute/Unmute a call While on a call, double-press the Action button.
Action button

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HEADPHONE CONTROLS
Action button
The Action button allows you to quickly and easily switch between noise
cancelling modes.
The Action button is located on the back of the left earcup.
Action button
To switch between Quiet Mode and Aware Mode, press the Action button.
For information about noise cancelling modes, see page 21.

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Noise cancelling reduces unwanted noise, providing a clearer and more lifelike audio
performance. You can choose between two noise cancelling modes: Quiet and Aware.
Quiet Mode allows you to block out distractions using the highest level of
noise cancellation.
Aware Mode provides full transparency and allows you to hear your surroundings
while enjoying your audio.
Choose your noise noise cancelling mode based on your listening preferences
and environment.
NOISE CANCELLING MODES
MODE DESCRIPTION
Quiet World-class noise cancellation with Bose-optimized audio.
Aware Hear your surroundings while enjoying your audio.
NOTE: When powered on, the headphones default to the last mode you used.
CHANGE THE NOISE CANCELLING MODE
To change the noise cancelling mode, press the Action button.
A voice prompt announces the selected noise cancelling mode.
TIP: You can also change the noise cancelling mode using the Bose Music app.
NOISE CANCELLATION

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VOICE CONTROL
ACCESS VOICE CONTROL
You can use the headphones to access voice control on your mobile device. To access
voice control, press and hold the Multi-function button for 1 second.
The Multi-function button is located on the back of the right earcup.
NOTE: You can’t access voice control while on a call.

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BLUETOOTH CONNECTIONS
CONNECT USING THE BLUETOOTH MENU ON YOUR
MOBILE DEVICE
You can store up to eight devices in the headphone device list, and the headphones
can be actively connected to two devices at a time. You can play audio from only one
device at a time.
NOTE: For the best experience, use the Bose Music app to set up and connect your
mobile device (see page 14).
1. Slide the Power/Bluetooth switch to the right land hold for 3 seconds.
You hear “Ready to connect,” and the status light blinks blue.

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BLUETOOTH CONNECTIONS
2. On your device, enable the Bluetooth feature.
NOTE: The Bluetooth feature is usually found in the Settings menu.
3. Select your headphones from the device list.
TIP: Look for the name you entered for your headphones in the Bose Music app.
If you didn’t name your headphones, the default name appears.
QuietComfort 45
Once connected, you hear “Connected to <device name>,” and the status light
glows solid blue for 10 seconds.

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BLUETOOTH CONNECTIONS
DISCONNECT A MOBILE DEVICE
Use the Bose Music app to disconnect your mobile device.
TIP: You can also use Bluetooth settings to disconnect your device. 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 device must be within range (30 ft or 9 m) and powered on.
• Make sure the Bluetooth feature is enabled on your mobile device.
CONNECT ANOTHER MOBILE DEVICE
To connect another device, download the Bose Music app (see page 14) or use the
Bluetooth menu on your mobile device (see page 23).
NOTE: You can only play audio from one device at a time.
IDENTIFY CONNECTED MOBILE DEVICES
Slide the Power/Bluetooth switch to the right land release to hear which device is
currently connected.
SWITCH BETWEEN TWO CONNECTED
MOBILE DEVICES
1. Pause audio on your first mobile device.
2. Play audio on your second mobile 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. Slide the Power/Bluetooth switch to the right land release to hear which device
is connected.
2. Within 2 seconds, slide the Power/Bluetooth switch to the right land release
again to connect to 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.
4. Play audio on the connected mobile device.
NOTE: If two devices are already connected to the headphones, the newly-connected
device replaces the second device that was previously connected.
CLEAR THE HEADPHONE DEVICE LIST
1. Slide the Power/Bluetooth switch to the right land hold for 15 seconds, 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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WIRED CONNECTIONS
CONNECT THE AUDIO CABLE
Use the 2.5 mm to 3.5 mm cable to connect a non-wireless device or to continue using
the headphones if the battery is depleted.
1. Connect the cable into the 2.5 mm port on the left earcup.
2. Connect the other end of the cable into the 3.5 mm port on your device.
NOTE: You can use the headphones powered on or o when the the audio cable
is connected.

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BATTERY
CHARGE THE HEADPHONES
1. Connect the small end of the USB cable into the USB-C port on the
right earcup.
2. Connect the other end into a USB wall charger.
NOTES:
• When the headphones begin charging, the status light blinks white for 10 seconds.
When fully charged, the status light glows solid white.
• The headphones don’t play while charging.
Charging time
Allow up to 2.5 hours to fully charge the headphones.
Hear the battery level
Each time you power on the headphones, a voice prompt announces the battery level.
When the headphone battery is low, you hear “Battery low, please charge now.”
NOTE: To visually check the battery, see the status light located on the right earcup.
For more information, see “Battery status” on page 29.

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HEADPHONE STATUS
The status light is located on the right earcup.
Headphone
status light
BLUETOOTH STATUS
Shows the Bluetooth connection status.
LIGHT ACTIVITY SYSTEM STATE
Blinking blue Ready to connect
Solid blue (10 seconds) Connected
BATTERY STATUS
Shows the battery level.
LIGHT ACTIVITY SYSTEM STATE
Solid white Medium to full charge
Solid amber Low charge
TIP: You can also check the battery level using the Bose Music app.