NB IoT alarm bell with strobe

4G alarm with phone call alert direct from Wanlin Fire Protection — 12-year factory experience, WL-SS101 fully certified EN 54-3/UL 464/UL 1971/CE/FCC/RoHS/REACH. Key specs: WiFi + Bluetooth 5.2, Ultra-Bright LED Strobe + Multi-Tone Sounder, 3-year replaceable lithium battery (4x AA). MOQ 100 units, 25-30 working days, OEM/ODM custom branding available. Ser···