Control principle: Microwave sensors transmit and receive information using high-frequency microwave signals, enabling them to accurately detect the movement and changes of objects. It amplifies the signal and conducts intelligent identification through the single-chip microcomputer program, so as to control the switch function of the load lamp. This principle is similar to radar technology and is widely used in aviation, spaceflight and various industries. Smart sensing: 1. When someone enters the detection range (within a diameter of 16m), the load light will be on. When the person leaves the detection range, the set delay time countdown ends, and the load light turns off automatically. 2. If someone enters the detection range and the load light is already on, any slight movement (including limb movement) before the end of the set delay time countdown will cause the sensor to keep the load light on until the person leaves and the set time countdown When finished, the load light turns off automatically. Intelligent Recognition: 1. This product can be set to turn off during the day and turn on at night when there are people. Alternatively, it can be set to stay on whenever desired. 2. The product provides a variety of lighting setting options, allowing customers to adjust according to their own needs to adapt to different environmental lighting conditions. Anti-interference: Our products are designed to intelligently identify useful human sensing signals and distinguish them from other interference signals present in the environment. This helps prevent false triggering of the lights by signals such as cell phone frequencies (eg 3GHz), Wi-Fi signals (eg 2.4GHz), TV remote signals (eg 433KHz), acoustic signals, and more. Identifying interference signals ensures product reliability. Please note that the package contains only the above items, other products shown in the pictures are not included. Due to differences in lighting and monitors, the item's color in the pictures may be slightly different from the actual product. Measurements allow +/- 1-3 cm.