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sensor replacement reminder — Wanlin Fire, Chinese smart smoke detector manufacturer and exporter by Wanlin Fire Technology. WL-SD-500 photoelectric smart smoke detector with 4G LTE and NB-IoT dual-mode connectivity, 10-year sealed lithium battery, 85dB sounder, app/SMS/push alerts, remote cloud monitoring. EN 14604, EN 54-7, UL 217, CE, RoHS certified. MOQ···
2-in-1 smoke detector direct from Wanlin Fire Protection — 12-year factory experience, WL-SFP900 smart fire detector certified CE/EN14604/EN54/UL217/UL268/FCC. Key specs: Multi-Sensor (Smoke+Heat+CO) + 4G LTE + WiFi + Cloud Platform + Complete Installation Kit + 10-Year Design, 4G LTE Cat.1 + WiFi + Cloud Platform + Mobile APP + Complete Kit (Gateway + 6 De···