automatic self check smoke alarm

Finland smoke detector direct from Wanlin Fire Protection — 12-year factory experience, WL-SM604 4G standalone smoke detector certified CCCF/GB 20517-2006/CE/UL 217/EN 14604. Key specs: Dual Light Path Photoelectric + AI False Alarm Algorithm + 4G Cat.1 + Edge Computing, 4G LTE Cat.1 + AI Cloud Platform + Smart Push + Predictive Maintenance + OTA Update. Dua···

LoRa communication smoke detector direct from Wanlin Fire Protection — 12-year factory experience, WL-SM602 fully certified CE/EN14604/FCC/RoHS/REACH. Key specs: NB-IoT (B1/B3/B5/B8/B20/B28) wireless, 10s alert push via APP/SMS/call, 10-year sealed lithium battery, CE/EN14604/FCC certified. MOQ 200pcs, 20-25 working days, OEM/ODM custom branding available. S···