1. Bluetooth version: V5.0
2. Working distance: 10m
3. Frequency response range: 50Hz-20KHz
4. Sensitivity: 108 +/- 2dB
5. Call duration: 5 hours
6. Song listening time: 4 hours
7. Standby time: 200 hours.
8. Headphone battery: 50 mAh
9. Headphone charging time: 1 hour.
10. Charging compartment: 2000 mAh
11. Cargo Container Size: 8*5.5**3cm
12. Load container weight: 82g
13. Weight of a single earphone: 4.5g