Bluetooth protocol: Bluetooth 5.0 Color matching: white. Bluetooth solution: Jerry D8 (two-channel voice call) Bluetooth support: HSP.HFP.A2DP.AVRCP Transmission distance: 20m Sound unit: 13mm Frequency range: 2.42-2.48GHz Battery: headset 50mAh charging box 350mAh Charging voltage: DC4.75-5.25V Charging time: about 1 hour Bluetooth music time: about 4 hours Talk time: about 5 hours Standby time: about 100 hours Charging compartment size: 44 * 54 * 21mm Single set of bare metal weight: 36g
