Bose QuietComfort 20 Acoustic Noise Cancelling Headphones

Owner's Guide

Introduction

Please read and keep this Owner's Guide. Take the time to carefully read and follow the Important Safety Instructions, Warranty and Contact information.

For additional information about your headphones or for replacement accessories, refer to:

http://global.Bose.com
U.S. only: http://Owners.Bose.com/QC20

Components

The Bose QuietComfort 20 headphones include the following components:

A. Control module
B. Answer/End button and microphone
C. Clothing clip
D. StayHear® + tips: Small (white); Medium, installed (grey); Large (black)
E. USB charging cable
F. Carry case

Charging

Allow up to 2 hours for a full charge before first use. Use the supplied USB cable to connect the headphones to a powered USB port on your computer or an agency approved wall charger (not supplied). When fully charged, headphones will have about 16 hours of battery life.

Note: Before charging, be sure the headset is at room temperature, between 41°F (5°C) and 104°F (40°C).

Powering on

Slide the power switch on the control module to On. The headphones will turn on in Noise Cancelling mode, which reduces most sounds around you.

Note: When the power is off, the headphones will still provide un-powered audio. For best quality audio, turn the power on.

Switching modes

Press the Mode button on the side of the remote to switch to Aware mode, which lets you hear some sounds around you, such as traffic noise.

[Mode button illustration]

Connecting to a smartphone

You can connect Bose QuietComfort 20 headphones to the standard 3.5 mm headphone jack on most smartphones.

Answering and ending calls

The headset comes with an easy-to-access Answer/End button with an integrated microphone for convenient control of most smartphones. Press the Answer/End button to answer or end a call.

[Answer/End button illustration]

Note: Some phones may require you to press twice or press and hold the Answer/End button for a few seconds.

Importance of Proper Fit

For effective noise reduction performance, it is important to choose the correct size StayHear® + tip.

Select the size that gives you the best comfort and fit in each ear. You may need to try all three sizes to determine the best fit. To test the fit, try speaking aloud (with the power off). Your voice should sound muffled in both ears. If not, select another tip size.

Each tip is marked with either an L or an R. Be sure to attach the left tip (L) to the left earpiece and the right tip (R) to the right earpiece.

To change a StayHear® + tip:

Gently peel the edges of the attached tip away from the earpiece, using care not to tear the tip.
Slide the new tip over the headphone nozzle.
Press the tip securely into place until you feel it latch. The ridge on the headphone housing should fit into the slot on the inside of the tip.

CAUTION: To prevent damage, do not pull on the tip wing.

Fitting the headphones to your ear

Insert the headphone into the ear so the tip gently rests in the opening of the ear canal.
Tilt the headphone back and lightly press the wing under the ear ridge until it is comfortable and secure. The tip should sit comfortably yet securely in the bowl of the ear.

Recognizing the lights

Power/Battery Indicator

Color	Status while in use:	Status while charging:
Green (solid)	Power on. More than 3 hours of battery life remaining.	Charging complete
Green (blinking)	Power on. Less than 3 hours of battery life remaining.	N/A
Amber (blinking)	N/A	Charging
Red	N/A	Error: See "Temperature range"
None (Off)	Power off or battery depleted.

Mode Indicator

Color	Indicates:
Green (On)	Noise Cancelling on.
None (Off)	Aware mode on.

Troubleshooting

Poor sound quality

Make sure the headphones are powered on and securely plugged into the headphone jack on the device.
Try another StayHear® + tip size.
Try another phone or application.
Clean the connector with isopropyl alcohol and dry with a clean cloth.
If you experience loud tones, turn off the power switch.

Poor or No noise reduction

Make sure the power is switched on and the Mode Indicator is on (green).
Try another size StayHear® + tip. See "Importance of Proper Fit".
Ensure that headphones are properly charged.

The headphones have short battery life (less than 16 hours)

When charging, be sure both ends of the USB cable are firmly connected and verify that the Battery Indicator is blinking amber.

Answer/End button not working

Make sure the headphones are securely plugged into the headphone jack on the device.

Microphone not working

Make sure the headphones are securely plugged into the headphone jack on the device.
Make sure the microphone is not blocked.
Try another phone call, device, or application.

Temperature range

Operate and store this product within the temperature range of -4°F to 113°F (-20°C to 45°C) only. Charge the battery where the temperature is between 41°F and 104°F (5°C and 40°C) only.

For your records

Please retain for your records. Serial number (on Warranty Card):

Now is a good time to register your headphones. You can do this easily by going to http://global.Bose.com/register.

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