QuietComfort 25 Acoustic Noise Cancelling headphones are the best-performing around-ear headphones from Bose. They give you crisp, powerful sound--and quiet that lets you hear your music better. Bose advances their industry-leading headphones with the latest proprietary Bose Active EQ and TriPort technology, giving the music you love deep, clear sound. At the same time, Bose noise cancelling technology monitors the noise around you and cancels it out, helping you focus on what you want to hear--whether it’s your music, your calls or simply peace and quiet. With a distinctive design and two color options to match your style, these headphones look as good as they sound. Included: QuietComfort 25 headphones; 56-inch QC25 inline remote and microphone cable; airline adapter; carrying case; AAA battery. Streamlength™ asynchronous USB code ensures low jitter, low resource load, minimal packet errors, world–class audio playback, and reliable connectivity between our DAC and any computing device compliant with USB Host Mode (as set forth by the USB Organization). Streamlength requires no additional drivers, making DragonFly Red virtually plug–and–play for Apple, Windows, iOS, and Android users.