fire multi level alarm

standalone smoke detector direct from Wanlin - 12-year factory experience, WL-SFP900 smart fire detector certified UL 217/UL 268/UL 2034/UL 864/CE/EN14604/EN54/FCC. Key specs: Multi-Sensor (Smoke+Heat+CO) + 4G LTE + WiFi + Cloud Platform + Complete Kit, 4G LTE Cat.1 + WiFi + Cloud Platform + Mobile APP + Complete Kit + Multi-Site. Smart fire IoT cloud platfo···