Sennheiser ACCENTUM Black Bluetooth headphones; Hybrid Active Noise Cancelling; over ear; closed back; dynamic; Bluetooth 5.2, codecs: SBC, AAC, aptX, aptX HD, mSBC, CVSD; frequency range: 10 Hz - 22 kHz; sound pressure level: 106 dB SPL; driver size: 37 mm; ear pads made of synthetic leather (vegan); integrated microphone for calls; battery life headphones: up to 50 hrs; loading time headphones: approx. 3 hrs; fast charging mode: 10 minutes loading = 5 hours battery life; charging socket: USB-C; app support for Sennheiser Smart Control App (available for iOS & Android); delivery content: Sennheiser ACCENTUM headphones, USB-C charging cable, carrying case; weight: 221g; color: black