Headphones Headsets F9 TWS V5.0 Binaural Wireless Stereo Bluetooth Headset with Charging Case(Black) accessories

Headphones Headsets F9 TWS V5.0 Binaural Wireless Stereo Bluetooth Headset with Charging Case(Black)
F9 TWS V5.0 Binaural Wireless Stereo Bluetooth Headset with Charging Case(Black)1. Bluetooth version: V5.0 2. Working distance: 10m 3. Frequency response range: 50Hz-20KHz 4. Sensitivity: 108 +/- 2dB 5. Call time: 5 hours 6. Listening to the song time: 4 hours 7. Standby time: 200 hours 8. Headphone battery: 50mAh 9. Headphone charging time: 1 hour 10. Charging bin: 2000mAh 11. Charging bin size: 8*5.5**3cm 12. Charging bin weight: 82g 13. Single earphone weight: 4.5g