EASY LISTENING: Adjust the volume, change tracks, and take calls with on-device touch controls. A dedicated button for your device's native voice assistant makes operating your headphones even easier. BACKGROUND NOISE CONTROL: Advanced Active Noise Cancellation reduces both high- and low-frequency background noises. Transparency Mode lets you tune back in to the outside world with a swipe of the touchpad. A SOUND EXPERIENCE: With a bass port for deep sound and two dedicated microphones for enhanced voice call clarity, these Bluetooth headphones provide unparalleled Bang & Olufsen Signature Sound. FREEDOM TO MOVE: Beoplay H9 wireless over-ear headphones can be paired with up to two devices at a time and will remember up to eight. A 10-metre operating range keeps you free to move. 25 HOURS OF MUSIC: A single, full charge (taking 2.5 hours) will keep your headphones going for 25 hours, with Bluetooth and Active Noise Cancellation switched on, thanks to a bigger, better battery. VOICE ASSISTANTS: This Amazon exclusive edition does not feature a built-in voice assistant, but will support your preferred device's native assistant.