How to use it:Step 1: Ring your hair and dry your skin.Use a medical alcohol scan to clean a flash window.Step 2: Connect the device, the power button begins in the flash, which shows that it is in a preparation mode.(Note: The power button is a flash light.)Step 3: Click the "Stop/Run" button to start the device, after starting the device, click "Stop/Run" to adjust the power level.The device contains 5 energy levels, from 1 to 5. (Blue density lamp is running)Step 4: Place the flash window vertically and steadily on your skin where you want to remove it, press the flash button..