1. Bluetooth version: V5.3 AD6973D4 (with power amplifier)
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
13. Microphone sensitivity: -42DB +/-2
14. Microphone impedance: 400ohms
15. Air conduction TWS headphones: do not fit into the ears and reduce hearing loss
16. Noise reduction method: Single microphone DNS call noise reduction
17. Input charging standard: DC 5V
18. Bluetooth working frequency: 2.402GHz-2.480GHz
19. Frequency response range: 20-20KHz
20. Transmission distance: Up to 15M
21. Voice prompt: Support
22. Wearing method: Earhook type
23. Interface: TYPE-C
24. Waterproof level: IPX4