Zildjian ALCHEM-E Black bluetooth headphones with 2-step ANC- over ear- closed back- dynamic- Bluetooth 5.3- Bluetooth-range: >15 m- frequency range: 8 Hz - 40 kHz- sensitivity: 94 dB/SPL- driver size: 40 mm- microphone- wired usage possible- battery life: >45 hours- personalized sound setup and customization to map your individual hearing via App (available for iOS and Android)- delivery content: ALCHEM-E headphones, carry case, audio cable (length approx. 1,8m, with cable storage), adapter 3,5mm stereo mini jack to 6,3mm stereo jack- USB-C charching cable (length approx. 0,9 m)- weight: 357g- color: black