Advanced Active Noise Cancellation (ANC) Large 40mm diaphragm for rich audio 8.0 CVC technology for enhanced audio clarity 6-microphone array for crystal-clear calls Auto Head Detection for Auto Play/Pause 30 hrs of Playback Patented ergonomic design Premium ADi noise reduction chip Wireless Version:V5.3 Transmission Distance:≥10m Frequency Response:20-20KHz Impedance:322 Rated Power:10mW Driver Unit:$40mm Battery Capacity:600mAh/3.7V Input:450mA Play Time:30H Standby Time:≥40H Charging Time:2-2.5H