1. Headscarf material: tapestry
2. Bluetooth version: 5.0
3. Bluetooth protocol: AGHSP
4. Bluetooth program: Bluetrum
5. Bluetooth transmission distance: 10 meters
6. Headphone channel: stereo 2.0
7. Music playback time: about 7-10h
8. Microphone distance: 1 meter
9. Bluetooth standby time: about 72h
10. Battery capacity: 150mAh
11. Battery power: 0.55W
12. Speaker impedance: 32 ohms
13. Speaker power: 0.02W
14. Frequency range: 2.4-2.4835GHz
15. Sensitivity: 45db
16. Transmit power: 6dB
17. Audio output distortion: 0.6%
18. Audio output signal-to-noise ratio: 93dB
19. Charging time: about 1-2h
20. Input voltage: DC 5V
21. Input current: 150mA
22. Input power: 0.55W
23. Packing list: headband, manual, charging cable