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3 in 1 Smoke Heat Carbon Monoxide Alarm direct from Wanlin Fire Protection — 12-year factory experience, WL-SM200 fully certified CE/EN54/FCC/RoHS. Key specs: 2.4GHz WiFi, Tuya/Smart Life app, Google/

Source Standalone Smoke Detector directly from Wanlin Fire, a leading Chinese manufacturer of NB-IoT Smart Smoke Detector. Product highlights: NB-IoT ultra-low-power, 8-year battery life, daily heartb