This is an outdoor use microwave and dual passive infrared composite intrusion detector with heating function. Using 8-bit high-speed microprocessor The direct calculation of 1 channel microwave and 2 channel passive infrared intrusion signals is carried out, bipolar detection, Automatic heating during cold winters digital signal sensitivity adjustment technology, etc.,A variety of factors that may cause false positives can be effectively filtered out, completely sealed plastic structure design, can avoid sunlight, rain, dust, insects, typhoons and other common outdoor interference factors, this detector heating function and good stability,is the first choice for safety protection in cold, high latitude areas.