Bluetooth chip:BES2300y Version:5.0 Hybrid Active Noise Cancelling Headphones Hifi stereo sound,Touch control Rechargeable battery capacity:600mA Bluetooth protocol:Support a2dp/avctp/hfp/spp/smp/att/gap/gatt/rfcomm/sdp/l2cap Sound frequency:20Hz-20KHz, 105Db total harmonic distortion(THD)0.1% Noise Reduction ratio: -35DB Talk through function Playl time: ANC on 24 hours, ANC off 30 hours Standby time:60hours Charging port: Type C Range:10m Driver unit diameter: 40mm. Support Apple MagSafe wireless charging Normal charging time:3 hours Operating temperature:-10~50 degree centigrade Storage temperature:-20 ~80 degree centigrade External sources:support 3.5 mm line in input