Shut out the world and lose yourself in your music—or let the world in. It’s your choice with the first in-ear noise cancelling headphones from Bose. The QuietComfort 20 Acoustic Noise Cancelling headphones let you enjoy better sound every day, everywhere you go. Turn on noise cancelling to reduce surrounding distractions and focus on your music. Or, at the touch of a button, activate Aware mode to hear what’s happening around you. Proprietary StayHear+ tips provide a soft, secure fit. The inline microphone and remote let you switch easily to calls and control of certain functions. 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 you—plus the freedom of an in-ear headphone. StayHear+ tips physically block some noise while our Acoustic Noise Cancelling technology electronically reduces most of what's left. It's just you and your music, even in noisy environments. 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, and you're back in touch with the sounds around you—while your music keeps playing, and you still experience some noise cancellation. Controls are all at your fingertips. Use the slider switch on the control module to turn noise cancelling on and off. The inline microphone/remote houses Aware mode and call answer/end buttons. The 4-button remote, provides volume and music control plus access to voice-recognition apps, like Siri or Google search. The 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. Color: Black Blue.SpecsQC20 headphones — Apple devices (Including cable and StayHear+ tips):52" L (1.55 oz)StayHear+ tips:1.25" H x 1" W x 0.5" DUSB cable:12" LClothing clip:1" H x 0.25" W x 0.5" DControl module:3.5" H x 1.25" W x 0.375" DCase:1" H x 5.5" W x 3.1" DFeaturesBose noise cancelling technology, shut out the world and focus on your musicAware mode to hear what’s around you at the press of a buttonDeep, clear sound from the Active EQ and TriPort technologySoft, and secure for hours of listening from proprietary StayHear+ ear tips