On the control module, slide the power switch 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.
on the side of the remote, press the mode button to switch to aware mode. this allows you to hear some sounds around you, such as traffic
Connecting your headphones
You can connect your Bose® QuietComfort® 20 headphones to the standard 3.5mm headphone jack on most smartphones and portable devices, such as an iPod®.
Answering and ending calls
the headset comes with an easy to access answer/end button with integrated microphone for convenient control of most smartphones. press the answer/end button to answer or end a call.
Note: Some phones may require you to press twice or press and hold the Answer/End button for a few seconds.