extra door sensors

security system fence direct from Wanlin Fire Protection — 12-year factory experience, WL-HK601 fully certified CE/EN14604/FCC/RoHS/REACH. Key specs: 4G LTE Cat.4 + WiFi 6 + Zigbee 3.0, AI multi-sensor fusion, 4G+WiFi dual-path, Hub: AC + 24h backup; Detectors: 10-year sealed lithium; Sensors: 3-year battery. MOQ 100 kits, 25-30 working days, OEM/ODM custom···