In-ear. Noise cancelling. Better sound. Consider them your go-to headphones, wherever you go. The first in-ear noise cancelling headphones from Bose give you more control over how you listen than ever before, in all kinds of environments. Block the outside world with full-on noise reduction. Or, choose Aware mode & let some of it inall while keeping your headphones on & your music alive with lifelike Bose sound. Wherever your day takes you, QC20 headphones keep you connected. To the beat of your music, & the pulse of what's around you. Impressive audio performance from exclusive Bose technologies Advanced noise reduction rivaling any full-sized headphone Aware mode for hearing what's around you while enjoying your music Long-lasting comfort plus stability from proprietary Stay Hear+ ear tips Lose yourself in your music QC20 headphones let you experience music on the go as never before. You'll enjoy lifelike, digital sound quality that stands out from the noise around youplus the freedom of an in-ear headphone. Stay Hear+ tips physically block some noise while our Acoustic Noise Cancelling technology electronically reduces most of what's left. It's just you & your music, even in noisy environments. Tune in to your environment But 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, & you're back in touch with the sounds around youwhile your music keeps playing, & you still experience some noise cancellation. Engaging sound All this, plus Bose lifelike sound. Sound you wouldn't expect from in-ear headphones. Our Tri Port technology & Active EQ combine to give your music a depth & balance that keep your daily soundtrack fresh & alive. The subtle details shine through, too. So wherever you are, your music's front & centre. Advanced ear tip technology And your music's even easier to enjoy when you're not fussing with your headphones. Proprietary Stay Hear+ tips create a soft, secure fit with no need to force them into your ears. The mushroom shape spreads contact evenly across the ear for maximum comfort, & forms a gentle seal that contributes to the headphones' full-spectrum noise reduction. You're in control Controls are all at your fingertips. Use the slider switch on the control module to turn noise cancelling on & off. The inline remote/microphone houses Aware mode & call answer/end buttons. The 2-button remote (QC20 model) is designed for your Android, Black Berry or Windows phone. The 4-button remote (QC20i model), customised for your iPhone or iPod, adds music control & voice commands. Rechargeable battery The environmentally friendly built-in lithium-ion battery (located inside the module) charges in just two hours with the included USB (Universal Serial Bus) cable, & delivers up to 16 hours playing time per charge. A battery indicator light displays power status. &, even if the battery dies your music still plays with performance equal to that of our regular in-ear headphones. When not in use, simply store your headphones & cables in the included carrying case.