smart fire alarm with app

Wanlin Fire - China source manufacturer for college fire alarm. Featured model WL-TH-IOT (Smart Wireless IoT Detector): Photoelectric smart smoke detector with NB-IoT module; EN54-7 Class A2 chamber, hourly cloud self-test; Local 85 dB sounder + cloud push / SMS / voice call; -10 to +55 deg C, 0-95% RH (tropical humidity rated). Full lineup: smoke and heat d···