RK111DT Dual Technology (infrared And Microwave) With Pet Immunity Motion Detector. Its features has intelligent control, microprocessor, top view and elegant design which are specially suitable for luxurious residence and commercial environments etc.. By using infrared and microwave simultaneously, and adopting microprocessor for digital signal processing, it well settles the false alarm caused by pets. Temperature compensation, anti-electromagnetic technology, and special pigmented lenses for stronger resistibility to white light, the false alarm problem has basically been settled.