An automatic control product based on infrared technology. When someone enters the sensing range of the switch, a dedicated sensor detects changes in the infrared spectrum of the human body, and the switch automatically switches on the load. The person is not leaving and is moving, and the switch is continuously conducting; After the person leaves, the switch will automatically turn off the load after a delay. When the person arrives, the light will turn on, and when the person leaves, the light will turn off. It is friendly and convenient, safe and energy-saving. Equipped with zero crossing detection function: contactless electronic switch, extending the service life of the load.