low battery indicator CO alarm

CO detector for municipal building direct from Wanlin Fire Protection — 12-year factory experience, WL-CO806 fully certified UL 2034/EN 50291/CE/FCC/RoHS/REACH. Key specs: 4G LTE Cat.4 + WiFi 6 + Zigbee 3.0, Electrochemical CO Sensor + AI False Alarm Reduction, AC powered + 48h backup battery. MOQ 100 units, 25-30 working days, OEM/ODM custom branding avail···