First Alert Carbon Monoxide Plug-in Alarm (battery Backup)

First Alert Carbon Monoxide Plug-In Alarm uses electrochemical carbon monoxide sensor and features a battery backup function.

Plug-in Alarm With Battery Backup

Uses Electrochemical Carbon Monoxide Sensor The Most Accurate Technology Available

ez-access Battery Door

Easy-to-use Mute Button

Includes 2 AA Batteries