smart fire IoT fire door monitor

smart fire overall solution direct from Wanlin — 12-year Chinese smart fire IoT manufacturer, WL-SFP400 certified UL 217/UL 268/UL 2034/UL 864/CE/EN14604/EN54/FCC. Key specs: Addressable MCP + Sounder Strobe + 4G LTE Cat.1 + Addressable Loop + LED, Addressable Loop + 4G LTE Cat.1 Backup + Cloud Platform + SMS/Push/Email + Relay Output. Complete smart fire Io···