1.Put the curing light into the charger socket, the yellow light is on.When it is done, the green light is on. It takes about 4-6 hours. Remove the adapter from the power supply after charging. 2.Press the power button,it is on. Press the power button over 2 seconds, it is off. When it is on, you can set the TIME(from 1- 6 seconds) ,then press the power button, it is working; press the power button again, it stops. 3.It will turn off automatically without any operation in a few minutes.