* BT Version:5.1                        

* Chipset: JL                               

*Support:HFP,HSP,A2DP,AVRCP

* Max playing time :    About 4-5 hours

* Stand by:220  hours

* Distance <=10M                       

* Battery Capacity:  50 MAH

* Battery Capacity of charging box: 1500mAh 

* Speaker:8mm 

*Sensitivity:98dB+/-5dB

*Frequency Range: 20Hz -20KHz