fire door closing timer

Fire Door Warning Buzzer China manufacturer. UL 60930 and EN 16061 certified fire door alarm with real-time position monitoring, 4G wireless alert, fire door status tracking, OEM/ODM, wholesale, global shipping to UAE. Contact: wanlinfirecontrol@163.com

fire door alarm with GSM direct from Wanlin Fire Protection — 12-year factory experience, WL-FD108 fully certified EN 1155/NFPA 80/CE/FCC/RoHS/REACH. Key specs: 4G LTE Cat.4 + WiFi 6 + Modbus RS485 + Matter, Premium Multi-Door Controller + LCD Display + Voice, AC 230V + 72h backup battery. MOQ 100 units, 25-30 working days, OEM/ODM custom branding available···