Product parameters:
1. Bluetooth version: V5.0.
2. Working frequency: 2.402GHz-2.480GHz.
3. Bluetooth effective distance: less than or equal to 8m.
4. Maximum power: 10mW.
5. Signal to noise ratio: greater than or equal to 75dB.
6. Frequency response: 60Hz-20KHz.
7. Built-in battery: lithium battery 3.7V / 50mAh.
8. Music time: about 2.5 hours.
9. Talk time: about 2.45 hours.
10. Charging time: about 1.5 hours.