Headphones with noise reduction: the perfect balance of silence, comfort and sound. Bose uses tiny microphones to measure, compare and counter external noises and reduce them through the opposite signal.High fidelity: TriPort acoustic architecture offers a deep and full sound. Active EQ with volume optimization always offers balanced audio performance, with low volume uniforms and always sharp high volume music.Quiet and Aware mode: choose Quiet mode for full noise reduction or Aware mode to listen to the outside world with your around-ear headphones and enjoy music while remaining aware of the surrounding environment.Over-ear headphones: These wireless headphones are so comfortable that they can be worn all day. Made of soft synthetic leather and shock-resistant nylon, they exert minimal pressure and are luxurious and durable.Up to 24 hours of autonomy: the battery guarantees up to 24 hours of use with only one charge. * A 15-minute quick charging offers 3 hours of playback when you're around or connects the included audio cable for greater autonomy.