Hoco ES52 Delight TWS wireless BT headset

Wireless Version:  V5. 1+EDR
Support Agreement:  A2DP1.3 HFP1.6 HSP1. 2
Bluetooth frequency: -2.4GHz
Bluetooth transmission distance: 10~15m
Battery capacity: 30mAh
Standby time: 120Hours
Playing/Talking time: 3~3. 5hours
Charging box capacity: 300mAh