First Alert Plug-In Carbon Monoxide Alarm with Battery Backup - Electrochemical - Gas Detection

Plug-in carbon monoxide alarm with battery backup easily plugs into any standard outlet with no additional mounting necessary. Battery backup ensures alarm works even during power outages. Mute button silences any nuisance alarms. Single button also tests alarm functions. Carbon monoxide alarm utilizes electrochemical sensor for increased accuracy. 5-year limited warranty. CO alarm meets UL standards.