Introduction
This manual provides essential instructions for the setup, operation, and maintenance of your Bose QuietComfort 3 Acoustic Noise Cancelling Headphones. These headphones are designed to deliver high-fidelity audio while significantly reducing unwanted ambient noise, enhancing your listening experience in various environments.
Please read this manual thoroughly before using your headphones to ensure proper function and longevity.

Image: A pair of Bose QuietComfort 3 Acoustic Noise Cancelling Headphones in black, shown with the audio cable connected and the inline remote visible.
Package Contents
Verify that all items listed below are present in your package:
- Bose QuietComfort 3 Acoustic Noise Cancelling Headphones
- Rechargeable Lithium-ion Battery
- Battery Charger
- Audio Cable (standard)
- Audio Cable with Inline Remote and Microphone (for iPhone/iPod control and hands-free calling)
- Airline Adapter
- Carrying Case

Image: All components of the Bose QuietComfort 3 package laid out, including the headphones, a zippered carrying case, two audio cables, an airline adapter, and the battery charger.
Setup
1. Inserting the Battery
- Locate the battery compartment on the right earcup.
- Gently open the compartment cover.
- Insert the rechargeable Lithium-ion battery, ensuring the contacts align correctly.
- Close the compartment cover securely.

Image: A detailed view of the battery module for the Bose QuietComfort 3 headphones, showing its shape and connection points.
2. Connecting the Audio Cable
- Identify the audio input jack on the left earcup.
- Insert the smaller end of your chosen audio cable (standard or with remote/mic) into the headphone jack until it clicks into place.
- Connect the larger end of the audio cable to your audio source (e.g., smartphone, tablet, MP3 player).
3. Powering On/Off Noise Cancellation
The noise cancellation feature is activated by a switch located on the right earcup. Slide the switch to the 'On' position to enable noise cancellation and to the 'Off' position to disable it. A green indicator light will illuminate when noise cancellation is active.
Operating the Headphones
Listening to Audio
Once the headphones are connected to your audio source and noise cancellation is activated, you can begin listening to music or other audio content. Adjust the volume using your audio source's controls.
Using the Inline Remote and Microphone
If you are using the audio cable with the inline remote and microphone (compatible with select Apple devices):
- Play/Pause: Press the center button once.
- Skip Track: Press the center button twice quickly.
- Previous Track: Press the center button three times quickly.
- Answer/End Call: Press the center button once during an incoming call or active call.
- Volume Control: Use the '+' and '-' buttons to adjust the volume.

Image: A man wearing Bose QuietComfort 3 headphones, seated and looking at a mobile device, illustrating typical usage.
Charging the Battery
The Bose QuietComfort 3 headphones operate on a rechargeable Lithium-ion battery, providing approximately 25 hours of use on a full charge.
- Connect the battery charger to a power outlet.
- Connect the charger cable to the charging port on the battery.
- Allow the battery to charge fully. The indicator light on the charger will change to indicate a full charge.
- Disconnect the charger once charging is complete.
It is recommended to fully charge the battery before initial use.
Maintenance and Care
Cleaning
- Wipe the headphone surfaces with a soft, dry cloth.
- Do not use liquid cleaners or solvents.
- Avoid getting moisture into any openings.
Storage
When not in use, store your headphones in the provided carrying case to protect them from dust and damage. Ensure the noise cancellation switch is in the 'Off' position to conserve battery life.

Image: A top-down view of the Bose QuietComfort 3 headphones, showing their design and how they can fold flat for storage.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound | Audio cable not fully connected; audio source volume too low; noise cancellation off. | Ensure cable is secure; increase audio source volume; turn on noise cancellation. |
| Noise cancellation not working | Noise cancellation switch is off; battery is low or not inserted correctly. | Slide switch to 'On'; check battery charge and insertion. |
| Battery not charging | Charger not connected properly; faulty charger or battery. | Ensure charger is securely connected to outlet and battery; try a different outlet. If problem persists, contact support. |
Specifications
- Brand: Bose
- Model: QuietComfort 3
- Color: Black
- Ear Placement: On Ear
- Form Factor: Over Ear
- Noise Control: Active Noise Cancellation
- Connectivity Technology: Wired
- Battery Life: Approximately 25 hours (rechargeable Li-ion)
Warranty and Support
For warranty information or technical support, please refer to the documentation included with your purchase or visit the official Bose support website. Keep your proof of purchase for warranty claims.
Bose Official Website: www.bose.com





