PIR sensor ST32 not only meets the design requirements, especially the functional requirements, it is suitable for installation rather than Switch for 2-wire/3-wire connection. It passes radiation the infrared ray immediately responds to the movement of the human body in the detection area of the sensor. It follows the space of your choice (room, garden, yard, space in front of the house entrance), If it detects movement at night or at night, it will automatically light up. Once the exercise stops, set The device itself will go out after time. Save electricity because it only illuminates the places where people move (stairs,Corridors, etc.).