fault alarm CO detector

connected carbon monoxide detector direct from Wanlin Fire Protection — 12-year factory experience, WL-CO805 fully certified UL 2034/EN 50291/CE/FCC/RoHS/REACH. Key specs: RF 433MHz Mesh + 4G LTE Backup, Electrochemical CO Sensor + RF Mesh Networking, 10-year sealed lithium battery (non-replaceable). MOQ 100 units, 25-30 working days, OEM/ODM custom branding···