1. Bluetooth version: V5.3 AC6976D8
2. Support protocols: HSP, HFP, A2DP, AVRCP
3. Battery capacity: 35mAh x 2 (without protection board, headphone board lithium battery protection IC)
4. Charging compartment battery capacity: 300mAh (with protective board)
5. Drive unit: Diameter 13mm
6. Charging time: 1H
7. Call duration: 5H
8. Play time: 6H
9. Standby time: 200H
10. Use time of headphones + charging case (80% volume): 20H
11. Sensitivity: 108+/-3dB
12. Speaker impedance: 32ohms
13. Input charging standard DC 5V
14. Frequency response range: 20-20K Hz
15. ENC bandwidth: 100Hz-3KHz
16. Transmission distance: up to 15M
17. Speaker: diameter 13mm
18. Voice prompt: Support
19. Multipoint connection: Not supported
20. Wearing method: Semi-in-ear
21. Instructions: Chinese and English
22. Interface: TYPE-C
23. Waterproof level: IPX6
24. ENC noise reduction depth (4-mic call noise reduction): Greater than -40dB