It is a digital intelligent automatic control product based on passive human body infrared technology. It has high sensitivity and high reliability and is widely used in various automatic induction electrical equipment. Immunity enhancement, internal use of digital signal processing, direct high-low output Low power consumption and small size for easy embedded installation. Repeatable trigger mode: After the high level of the sense output, during the delay time period, if the human body is active in its sensing range, its output will remain high until the delay after the person leaves, Low level (i.e.: the sensing module automatically delays a delay period after each activity of the human body, and the last active time is the starting point of the delay time). Widely applications: Security Products, the human body sensors toys, the human body sensor lighting, industrial automation and control, etc.