The B&O Beoplay H9i Wireless Over-Ear Headphones combine ANC, wireless and an innovative aluminium touch interface to deliver a rich and powerful sound experience. Advanced Active Noise Cancellation Wireless via Bluetooth Transparency Mode Proximity sensors Up to 18-hour playtime Advanced ANC Advanced Active Noise Cancellation technology lets you immerse yourself completely in your music or you can just enjoy total silence. Transparency Mode lets you amplify your surroundings so you can hear what’s going on around you. Intuitive touch interface With simple gestures back and forth, up and down or around, you can control everything directly from the ear cup! If you want to answer a call, change the song or turn up the volume, it’s just a matter of a single touch – and because the aluminium plate is both mechanical and sensitive – it doesn’t matter if you’re wearing gloves it always works. Enhance your experience The Beoplay H9i Wireless Over-Ear Headphones have been updated with a host of new features including Transparency Mode, so you can tune into ambient sounds and proximity sensors for automatic play/pause when you take your headphones on or off. H9i have even better sound quality with an improved ANC performance, enhanced call quality and a new bass port which ensures deeper, more powerful bass. Extend your playtime with the exchangeable battery Beoplay H9i features a rechargeable and exchangeable battery with up to 18 hours of playtime. For those longer journeys, you can exchange the battery for longer playtime or simply attach the audio cord to keep enjoying your music.