The timing switch can not only control the light intensity of the light bulb, but also control the working time of the light bulb (optional 2H/4H/8H)1. Timing system: After pressing the red switch, the timing button can be pressed. Press once for 2 hours, then press again for 4 hours, and press the third time for 8 hours. You can set 8H before going to bed and 4H before going out to eat. When the time comes, it will automatically power off.2. Control light intensity: Press the plus sign to increase brightness, and press the minus sign to decrease brightness. We do not recommend rapidly increasing or decreasing brightness as it will shorten the lifespan of the heating lamp Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.