Bluetooth chip:JL7018 Version:5.4 Hybrid Active Noise Cancelling Headphones Hifi stereo sound,metal surface treatment 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 59 hours, ANC off 40 hours Standby time:600hours Charging port: Type C External sources:support 3.5 mm line in input Range:10m Driver unit diameter: 40mm. Normal charging time:3 hours Operating temperature:-10 ~50 degree centigrade Storage temperature:-20~80 degree centigrade
