Features 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. Bluetooth range-up to 9 m (30 feet). 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. UP TO 22 HOURS BATTERY LIFE: Enjoy 22 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. 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. BOSE SIMPLESYNC TECHNOLOGY: SimpleSync pairs your Bose QuietComfort 45 headphones with select Bose smart soundbars for a personal TV listening experience. Independent volume controls allow you to lower or mute your soundbar while keeping your headphones as loud as you like.Away from your phone. Press and hold the Bluetooth button on each device to sync their sound. Already got a group going.Link by pressing the Action button to connect at a moment’s notice.