First Alert® CO615A Carbon Monoxide Alarm, Electrochemical Sensor, AA Battery, Digital LCD Display, 85 dB

This plug-in electrochemical carbon monoxide alarm accurately alerts of increased CO levels in the home. The alarm easily plugs into any standard outlet and features battery backup for full protection during power outages. The backlit digital LCD screen illuminates to display hazard level with alarm or at the touch of a button. A single button mutes false alarms, and also tests alarm functions.