Noise cancelling wireless headphones – The perfect balance of quiet, comfort, and sound. Bose uses tiny mics to measure, compare, and react to outside noise, cancelling it with opposite signals. High-fidelity audio – The TriPort acoustic architecture offers depth and fullness. Volume-optimized Active EQ maintains balanced performance at any volume, so bass stays consistent when turned down and the music remains clear when turned up. Quiet and Aware Modes – Choose Quiet Mode for full noise cancelling, or Aware Mode to bring the outside into the around ear headphones and hear your environment and your music at the same time. Personalize your audio. Adjustable EQ allows you to set the bass, mid-range, and treble levels to your personal preferences or select one of several preset options. Up to 24 hours battery life – Enjoy 24 hours of battery life from a single charge. A quick 15-minute charge offers 3 hours when you’re on the go, or plug in the included audio cable to listen for even longer in wired mode.