Product parameters:
1. Bluetooth version: BT 5.0.
2. Bluetooth effective distance: 10m.
3. Headphone frequency response range: 20Hz-20kHz.
4. Battery type: lithium polymer battery.
5. Output power: 5mW.
6. Single earphone battery capacity: 55mAh.
7. Charging case battery capacity: 350mAh.
8. Headphone impedance: 16 ohms.
9. Charging interface: Type-C.
10. Single headset weight: 5.4g.