1. Bluetooth version: V5.3 Jerry AD6973D4
2. Support protocols: HSP, HFP, A2DP, AVRCP
3. Battery capacity: 110mAh (battery without protection board, headphone board lithium battery protection IC)
4. Charging compartment battery capacity: 450mAh (with protective board)
5. Charging time: 2.0H
6. Call time: 9H
7. Play time: 10H
8. Standby time: 300H
9. Speaker specifications: Diameter 16mm/20 ohm
10. Sensitivity: 93+/-3
11. Impedance: 20 ohms