2. The input port has polarity (positive and negative), and reverse connection is prohibited. The wiring operation should be performed in a power-off state. After the wiring is completed, the installation and lighting connection should be checked for correctness before powering on. If the DC voltage wiring or lighting installation is incorrect, a short circuit may occur, causing the controller to malfunction. 3. This product is only suitable for use in a dry indoor environment. Strong wind, high temperature or severe vibration may cause sensor failure. 1. This product uses low-voltage DC 12V-24V to work, and must be connected to a switching power supply. It is prohibited to directly connect to 220V, otherwise the controller may be damaged. 4. The sensing angle is 120 degrees, the sensing distance is 1-3 meters, and the sensor is most sensitive when facing people 5. AB sensing heads should be arranged according to the site settings.