1.Bluetooth version: V5.3 AD6973D4
2. Supported protocols: A2DP HFP AVRCP
3. Battery capacity: 65mAh (The headphone battery does not come with a protection board, the headphone board has a lithium battery protection IC)
4. Charging compartment battery capacity: 400mAh (with protective board)
5. Charging time: 1.5H
6. Talk time: 7.5H
7. Play time: 8.5H
8. Standby time: 200H
9. Speaker specifications: 10*8.5*2mm square speaker
10. Sensitivity: 119+/-2dB (800MV 1KHZ)
11. Impedance: 30ohms +/- 15% Ohm, at 1KHz
12. Output power: 21mW