1.Wireless Version: 5.0
2. Operation Distance: 10m
3. Transmitting Power: Class 2
4. Frequency Range: 2.402 -2.480 GHz
5. Speaker: Ø40mm
6. Impedance: 32Ω
7. TF card Supported: 128M-32G
8. Radio Frequency Response: 87.5-108MHz
9. Rechargeable Lithium Battery: 400mAh
10. Music Playing Time: 12h
11. Talking Time: 12h
12. Charging Time: 2.5h