KEF Mu7 Headphones Sound by KEF. Design by Ross Lovegrove. The KEF Mu7 Noise Cancelling Over-ear Wireless Headphones deliver premium sound quality coupled with the ease of wireless listening. For these extraordinary headphones, KEF has once again collaborated with visionary designer Ross Lovegrove; a relationship that started with the incredible Muon loudspeakers, through Muo Bluetooth speakers and now the Mu headphones. Tuned by the KEF engineering team, Mu7 delivers pristine, high-resolution sound on the go, and thanks to Smart Active Noise Cancellation and intuitive controls you’ll never miss a beat. Bluetooth: Y Depth: 89 MM Height: 199 MM Width: 153 MM Dongle Required: N Power Output: Up to 20W Wifi Enabled: N Smart Active Noise Cancellation monitors the surroundings and eliminates external noise under different environments 40mm full range dynamic driver engineered to reveal the smallest details of your favourite music High-resolution sound up to 24bit/48kHz via Qualcomm® aptXâ„¢ HD codec Bluetooth 5.1 for exceptionally stable connections with both iOS and Android devices Intuitive touch control of music and calls with simple swipes and taps Ergonomic design for comfort and fit Up to 40-hour use at full charge (Bluetooth and ANC enabled) Fast charging of 15 mins for 8-hour use Fold flat for easy carrying and storage Clear Voice Capture (cVc) for clear voice calls