1.Rechargeable Lithuim battery120mAh

2.Input Voltage:DC 5V 1A
3.1xUSB rechargeable cable; Type C Jack
4.70minutes for chargeablle fully, using 3-4h

5.4 EMS Modes can be selection
6.M Long press power on for 2 seconds, default mode 1, strength 0.
7.10 EMS intensities can be selection
8.When you switch modes, the new mode returns to zero.
9.Press two seconds to turn off the light.
10.Timer: 10mins
11.suitable for Knee&Calf&Arm 30-40CM