1.Bluetooth version: V5.0+EDR
2.Wireless frequency: 2.402GHZ-2.480GHZ
3.Supporting agreement: HFP1.7/A2DP1.3//AVRCP1.6/SPP1.2andPBAP1.2, BDR/BLE
4.Bluetooth Version: RTL8763BFR
5.Transmission distance: 15 meters
6.Battery capacity: 50mAh
7.Charging voltage / current: 5V / 1A
8.Play / talk time: about 6 hours
9.Charging time: about 2 hours
10.Standby time: 120 hours
11.Speaker impedance: φ8MM 32Ω
12.Microphone sensitivity: -42Db
13Gross weight: 4 g * 2