Specification:

Driver unit:40mm

Sensitivity:110±3db

Frequency Response:20Hz~20KHz

Bluetooth Version:JL V5.1+EDU

Operating Range:10m(No Obstacles)

Operating Voltage Range:3.5-5V

Talk time:Up 8hrs

Standby time:About 200hrs 

Charging time:About 2hrs

Battery capacity:380mAh

Charging Specifications:USB