"1.ANC Active Noise Cancelling Headphones2. Folding storage, retractable arm3. Phone and music automatic conversion, up/down selection, play/pause4. Stereo high-quality listening to music, shocking bass effect, clear calls5. Pluggable audio cable, Bluetooth to wired headset6. Ergonomic and comfortable wearing design""Bluetooth version QCC3001 V5.0Channel system Stereo (two channels)Battery capacity 1050mAh/3.7VDrive unit 40mmproduct weight The gross weight of a single product with packaging is 720gSignal-to-noise ratio110dbCharging time 2-3hTalk time 50hMusic duration 26-46hSupport Protocol HSP/HFP/A2DP/AVRCPInput charging standard DC 5V 300MABluetooth operating frequency 2.402GH-z-2.480GH-zBest call distance <1MMaximum transmission distance 10MVoice prompt supportWearing head-mountedManual Chinese and EnglishIncluded accessories USB charging cable, manual, audio cable"