Nighthawk AC/DC Plug-in - 9V Backup - No

Kidde 21007308 Nighthawk Plug-In Carbon Monoxide Alarm With Battery Backup, 85 DB At 10 FT Loud, 60 HZ Operating Frequency, 120 VAC Operating, 60 MILAMP Operating, 40 - 100 DEG F Operating, Environmental Conditions: 10 - 95 PCT Relative Humidity (RH), Electrochemical Sensor, Dimensions: 3 IN Width X 5.6 IN Height X 1-1/2 IN Depth, LED Display, Mounting: Wall, Included: 9 V Battery, UL 2034, For All Living Areas