4G fire alarm sounder strobe combo

NB-IoT alarm sound and light combo direct from Wanlin Fire Protection — 12-year factory experience, WL-SS104 fully certified EN 54-3/UL 464/UL 1971/CE/FCC/RoHS/REACH. Key specs: LoRaWAN 868/915MHz, High-Intensity LED Strobe + Multi-Tone Sounder, 3-year replaceable battery (2x C lithium). MOQ 100 units, 25-30 working days, OEM/ODM custom branding available. S···