•Form “A” or “C” alarm contact and tamper switch •Digital signal analysis •Pet immunity up to 55 lbs (25 kg) •Quad Linear Imaging Technology for sharp analysis of body dimensions and differentiation from backgrounds and pets •Microwave detection based on Doppler concept •Unique microwave motion sensor module with micro-strip patch antenna •Advanced ASIC-based electronics Height installation calibration free 2-way PIR/microwave sensitivity adjustment