Bluetooth version:Bluetooth 5.0 Bluetooth protocol: BLE/HSP/HFP/A2DP/AVRCP Transmission distance: 10M Headphone battery capacity: 50maH Single working hour: Around 4-5 hours Battery capacity of charging box: 600maH Charging box working hour:Around 25 hours Charging time: Around 1.5hours Speaker: φ6,16Ω