* Bluetooth version:AIROHA 4.1
* Loudspeaker size:7mm
* Speaker Impedance: 16Ω
* SPL(sound pressure level):99bd±3db
* Max Power: 2mW
* Frequency response: 20-20KHz
* Battery capacity: 80MAH
* Microphone sensitivity: -38dB
* Continuous Operating Time:4H
* Operation distance:>10M