This is an excellent performance of outdoor use dual passive infrared composite intrusion detector with solar charging technology. The 2-channel passive infrared intrusion signals is directly calculated and analyzed by an 8-bit high-speed microprocessor , bipolar detection, automatic temperature compensation, direct adjustment of digital signal sensitivity technology, etc., which can effectively filter out a variety of factors that may cause false positives, and completely seal the plastic structure design, which can avoid sunlight, rain, dust, insects, typhoons and other common outdoor interference factors. This detector has a variety of advanced technology and good stability, can give you the best outdoor safety protection.