Active noise-cancellation Immerse yourself in your favourite playlists with the Bose QuietComfort 45 Wireless Bluetooth Noise-Cancelling Headphones. Their Acoustic Noise Cancelling technology measures and reacts to outside noise, so that you can fully enjoy the music you love. You can also switch between full and partial noise cancellation with the Quiet and Aware modes - perfect for when you want to listen-out for cars on your morning commute. There's even a noise-rejecting mic that isolates your voice and filters out environmental sound, so that you can take calls when you're out and about. High-fidelity audio Music tracks, podcasts and videos will all sound fantastic thanks to the TriPort acoustic design of the earcups. This creates a sound that's full of depth and true to life. The Volume-optimized Active EQ also boosts the highs and lows of what you're listening to, so that you can enjoy the same high-quality audio no matter the volume level. Download the free Bose Music app on your smartphone for extra controls and features - manage connections, share your music and more. Built to last and feel great The Bose QuietComfort 45 Headphones are the perfect mix of functionality and comfort. The headband is strengthened with glass-filled nylon, while the lightweight design and synthetic leather earcups make them comfortable to wear all day long. All-day battery With a built-in battery that lasts up to 24 hours per charge, your headphones will easily last throughout the day and into the night. If they do happen to run out of power, you can still listen with the included cable - just connect to your device and they're instantly ready to use.