1.Bluetooth version: V2.1+EDR

2.Chipset: CSR

3.Frequency Response: 20Hz-20KHz

4.Work Frenquency:2.402GHz-2.480GHz ISM Band

5.Sensitivity: -80dbm 

6.Transmit range: up to 10m 

7.Battery: Li-ion. 3.7V/150mA 

8.Charge power : PC USB, 5V 

9.Continuous working time: About 5 hours

10.Charging time: 1-2 hours 

11.Microphone:Microphone size:4mm

12.Sensitivity:-52db

13.Impedance:≤2.2kΩ

14.Frequency response: 75HZ-16KHZ

15.Speaker:Speaker diameter:13mm

16.Impedance:32Ω

17.Sensitivity:108db

18.Speaker Power：2*5mW

19.Frequency Response:20HZ—20KHZ