Specification:

* BT Version:5.0                        

* Chipset: JL                               

*Support:HFP,HSP,A2DP,AVRCP

* Max playing time :    About 6-7 hours

* Stand by:120 hours

* Distance <=10M                       

* Battery Capacity:  55 MAH

* Battery Capacity of charging box: 400mAh 

* Speaker:7mm 

*Sensitivity:98dB+/-5dB

*Frequency Range: 20Hz -20KHz