NB IoT alarm for commercial use

wireless alarm with waterproof direct from Wanlin Fire Protection — 12-year factory experience, WL-SS106 fully certified EN 54-3/UL 464/UL 1971/CE/FCC/RoHS/REACH. Key specs: 4G LTE Cat.4 + WiFi 6 + Zigbee 3.0, Smart Strobe + AI Adaptive Volume Control, AC powered + 48h backup battery. MOQ 100 units, 25-30 working days, OEM/ODM custom branding available. Ser···