RK410DT Dual Technology (infrared and microwave) With Pet Immunity Motion Detector has intelligent control, elegant design and microprocessor. Which are especially suitable for residential environments. It could prevent the false alarm caused by 35KG dog, 3 cats or other kinds of rodents. Using special digital signal processing, true temperature compensation, anti-electromagnetic technology and special pigmented lenses, ensures the detector no any false or lost alarm in any environment.