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The black QuietComfort 20 Acoustic Noise-Cancelling In-Ear Headphones from Bose feature their active noise-cancelling technology with an in-ear headphone design. The headphones are powered by Bose's TriPort Acoustic drivers to produce a balanced frequency response. They are powered by the built-in rechargeable lithium-ion battery that provides up to 16 hours of noise cancellation per charge. The in-line microphone and remote allows you to take calls and control your Android, Blackberry, or Windows phone.
There are moments when you may not want to be so cut off from your surroundings. Crossing a city street. Waiting for airline gate announcements. This is where Aware mode comes in. Instead of removing your headphones, just press a button, and you're back in touch with the sounds around you - while your music keeps playing, and you still experience some noise cancellation
The environmentally friendly built-in lithium-ion battery (located inside the module) charges in just 2 hours with the included USB cable, and delivers up to 16 hours playing time per charge. A battery indicator light displays power status. And, even if the battery dies, your music still plays with performance equal to that of our regular in-ear headphones