CO & Gas Alarm

Universal 2-in-1 Carbon Monoxide and Natural Gas Alarm...model # MCND401B...4.25" high X 2.5" wide X 1.5" deep...120-Volt AC Plug-In Alarm with Battery Back-Up... Back-up Battery Continues protection in the event of a power outage...9-Volt Energizer Alkaline Battery not Included...Digital Display Screen with Three LED Colors Indicating Power, CO and Natural Gas...Microprocessor Software Virtually Eliminates Nuisance Alarms...Compact Plug-in Design...No Additional Mounting Required Swift Installation Process...made in China... for Universal Security Instruments, Maryland, USA...original box with manual...never used...like new condition Meets New Laws & Legislations - This alarm exceeds industry standards, and is listed to UL Standard UL 217 and is California State Fire Marshal approved.