* Bluetooth version：BEKEN 4.1
* Loudspeaker size：40mm
* Speaker Impedance: 32Ω
* SPL(sound pressure level):103bd±3db
* Max  Power: 30mW
* Frequency response: 20-20KHz
* Battery capacity: 350MAH 
* Microphone sensitivity: -38dB
* Continuous Operating Time: 8H
* Operation distance:>10M