HXSJ Air-S4 Bluetooth 5.1 True Wireless HiFi Stereo Earphones with Charging Case(White)

1. Bluetooth version: V5.1+EDR
2. Bluetooth protocol: A2DP1.3/HFP1.6/HSP1.2
3. Chipset:Bluetrum 5376
4. Shell material: ABS+PC
5. Charging time: 1 hour
6. Bluetooth distance: 10m-15m
7. Earphone battery capacity: 30mAh*2
8. Standby time: 240Hours
9. Play/Calling Time: 2-2.5 Hours
10. Charging box battery capacity:200mAh
11. Speaker model: φ 13. Round horn
12. speaker size: φ 13mm
13. Impedance: 320 Ω
14. Rated power: 3mW
15. Maximum power: 5mW
16. Frequency response:20hz- 20Khz
17. Charging time of charging box:1.5-2 Hours
18. The mumber of times the charging box charges the headset: 3 times
19. The blue lights of main and auxiliary /TWS connection success indication: engines flash slowly at intervals
20. Single headphone weight：7g
21. Single headphone size：3.1*1.6*1.6cm
22. Charging box weight：19g
23. Charging box size: 4.4*4.3*2.1cm