The First Alert® CO400B is a alkaline battery operated, 9 VDC single station carbon monoxide alarm specifically designed for residential and institutional applications including sleeping rooms of hospitals, hotels, motels, dormitories and other multi-family dwellings as defined in standard NFPA 720. Model CO400 complies with UL 2034, NFPA 720 and other agencies that model their codes after the above agencies.

First Alert® Carbon Monoxide Alarm, Battery Operated, 9 VDC, Electrochemical Sensor, Alarm: Audio, Alkaline Battery Power Source, 85 dB Alert, LED Indicator Visual Alert, 10 to 90 % Humidity, 40 to 100 deg F Operating, Plastic, White, 5.6 in Dia x 2 in H

• https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/First_Alert_CO400B_User_Manual.pdf https://www.iesbuy.com//ASSETS/DOCUMENTS/ITEMS/EN/https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/First_Alert_CO400B_User_Manual.pdf
• https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/IDW_DOCUMENT_432e8b82fff9620c299d0ca20e62aaa5ea65b46095551788d3bd870b033731d2.pdf https://www.iesbuy.com//ASSETS/DOCUMENTS/ITEMS/EN/https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/IDW_DOCUMENT_432e8b82fff9620c299d0ca20e62aaa5ea65b46095551788d3bd870b033731d2.pdf
• https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/First_Alert_CO400B_Specification_Sheet.pdf https://www.iesbuy.com//ASSETS/DOCUMENTS/ITEMS/EN/https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/First_Alert_CO400B_Specification_Sheet.pdf

• Auto or manual selectable changeover
• Installs in minutes
• Displays outdoor temperature and humidity
• 1 year battery life
• 2 month low battery warning
• Dual Fuel enabled
• Module receives communication from the wireless devices
• RETURN AIR SENSOR - Works with the Equipment Interface Module to maintain safe indoor temperatures if power is lost at the wireless thermostat
• Maintains 62 F for heating and 82 F for cooling
• REDLINK WIRELESS TECHNOLOGY - Powered by RedLINK reliability
• No interference with other wireless devices in the home