1. Bluetooth version: v5.0 + EDR
2. Wireless frequency: 2.4GHz
3. Support protocol: A2DP1.3 / HFP1.6 / HSP1.2 / AVRCP1.6 / D11.3
4. Transmission distance: 10m
5. Headphone battery capacity: 50mAh
6. Headphone charging voltage / Current: 5V / 1A
7. Play/talk time: about 4 hours
8. Charging time: about 1 hour
9. Standby time: 120 hours.
10. Speaker impedance: Diameter 8mm 32 ohms
11. Microphone sensitivity: -42dB
12. Working temperature: -10-50 degrees Celsius