B39 Wireless Bluetooth V5.0 Headset, B39 (Red), B39 (White), B39 (Black Red), B39 (Black)

1. Drive: 40mm
2. Impedance: 32 OHM
3. Bluetooth version: V5.0
4. Bluetooth frequency band: 2.4GHz
5. Power level: CLASS II
6. Bluetooth distance: barrier-free 10 meters
7. Frequency response: 20-20000Hz
8. With A2DP/AVRCP high-quality stereo audio transmission and remote control protocol
9. Charging time is about 1 hour
10. Talk time is about 10-12 hours
11. Music time is about 2-3 hours
12. Standby time is about 120 hours
13. Battery capacity 400mah/250mah
14. Charging power supply: DC5V power supply [round hole interface] (computer USB port, mobile phone charger, car charger)
15. Compatible mobile phone: compatible with Android, Apple, Microsoft, Saipan system 99% of mobile phones with Bluetooth function