QuietComfort® 3 Acoustic Noise Cancelling® headphones deliver acclaimed Bose® performance in a compact, on-ear design. Just slip them on and experience full-spectrum noise reduction that fades unwanted sounds into the background. Rich, clear audio reveals nuances you might have previously missed. And a lightweight, comfortable fit offers hours of listening enjoyment. It's a unique combination of benefits available only from Bose. On-ear QC3 headphones match the noise reduction and audio quality benefits of our around-ear QC2 headphones. Wear them when you fly, and you'll notice a dramatic decrease in engine roar the moment you turn them on. Connect your MP3, DVD or CD player, or listen to the in-flight movie. You'll hear audio detail and clarity you may have never experienced before. When you just want to create a sanctuary for yourself, simply remove the detachable cord and enjoy the benefits of untethered noise reduction. Use QC3 headphones at home or at the office and notice unwanted distractions fading softly into the background. An optional Cell Connect cable also lets you use your QC3 headphones with most music-enabled mobile phones. Of course, no headphones will eliminate all noise. But proprietary Bose noise reduction and audio technologies work together to make almost any listening experience more rewarding with QC3 headphones. And when you're done listening, the earcups fold flat for compact storage in a slim carrying case. For added convenience, QC3 headphones are powered by a rechargeable battery with approximately 20 hours of run time. Both the battery and a wall-socket charger are included with your purchase.