Chuango 315Mhz SMK-500 Wireless Alarm Security Smoke Fire Detector Photoelectric Smoke Alarm

Features: *Chuango 315Mhz SMK-500 Smoke Fire Detector For G5 B11 A11 G3 A9 H5 GSM Wifi Alarm System. *The SMK-500 must be installed per NFPA instructions, and can only detect for smoke (not combustible fumes, temperatures or flames). *Exclusive smoke intelligent algorithm, high sensitivity, no false alarm, strong anti-interference.No wiring needed. *Anti-light, Moth-proof, Dust-proof, moisture-proof, High stability. Low power CMOS microprocessor, effectively extend battery lifespan. *Once triggered, light will flash with loud high volume alarm sound, louder than 85dB.