First Alert CO615 Carbon Monoxide Alarm - Wired - 120 V AC - 85 dB - Audible - Wall Mountable, Stand Mount

The First Alert CO615 Dual-Power Carbon Monoxide Plug-in Alarm alerts you to dangerous carbon monoxide levels. This carbon monoxide detector operates on a dual-power system with battery backup for continuous monitoring, even in the event of a power outage. The backlit digital screen tells you, at a glance, what the carbon monoxide and power levels are. The monitor also features a convenient test and silence button and an end-of-life timer that lets you know when it is time to replace the unit.