The background light is designed on the touch switch board. The background light and the touch switch are designed as one. When the power supply and the switch are connected, the background light on the switch board will light up after the power supply is powered on, and the background light will be permanently on. Touch switch function: when the human body touches the light for the first time, and then touches the light off again, it cycles in turn. It can ensure the safe use of electricity by users, and has a surge absorber, which can effectively prevent the outside world and the interference to the outside world. Suitable for all kinds of lamps with medium (such as glass, acrylic, plastic, ceramic, etc.). Wiring method: the blue and red wires are connected to AC220V input, the other coffee and blue wires are connected to AC220V output, and the black touch head is installed on the back of the mirror., Manufacturer: ZIJIA