Product specifications:
1. Size: 72x38x30mm.
2. Working voltage: 3.3V-4.2V.
3. Bluetooth version: V5.0+EDR.
4. Headphone battery capacity: 45mAh.
5. Charge box battery capacity: 350mAh.
6. Duration of use: 3-4 hours.
7. Standby time: about 60 hours.
8. Speaker type: titanium composite film.
9. Transmission range: 2.40GHz-2.48GHz.
10. Sensitivity: 98+3dB.
11. Communication distance: The effective distance is 15 meters.
12. In-ear mode: slant into the ear to fit the contour.
