• Microwave using X-Band patch antenna • Pet immunity 20kg • AND/OR function(AND means alarm for MW&PIR, OR means alarm for MW or PIR) • External tamper • SMT technology, high EMI/RFI immunity • White light immunity 20000 Lux • Temperature auto-compensation, avoiding false alarm • Microwave detection range adjustable • Pulse count optional • Innovative railway installation method, easy for installation