This is an excellent wireless ceiling-mounted passive infrared detector, passive infrared sensor and accurate spherical lens coverage360 degree detection Angle, the use of ultra-low power micro-processor and low voltage circuit design, with advanced digital signal processing technology, with very low leakage alarm and false alarm, intelligent temperature compensation technology can complete all kinds of intrusion motion detection in a wide temperature range. In addition, it also has a good performance in anti-thermal airflow, curtain swing, small animals and other false moving objects, and its performance and stability far exceed the wireless ceiling passive infrared detector of the same price on the market. The appearance of atmosphere, convenient installation, suitable for indoor applications in a variety of occasions, such as warehouses, hotel rooms, offices, etc.