Intelligent microwave and passive infrared composite detector with microwave masking technology. The intrusion signal is processed by 8-bit high speed microprocessor direct calculation, bipolar detection, automatic temperature compensation, digital signal sensitivity adjustment technology, etc., will cause many possibilities The factors of false positives are effectively filtered out, photoelectric solid-state relay design, with strong antielectromagnetic radio frequency interference ability. High reliability, error-free , beautiful appearance, is the ideal choice for residential, office, hotel, warehouse and other anti-theft systems.