First Alert Plug-In w/Battery Back-up Electrochemical Carbon Monoxide Detector

The First Alert Dual-Power Carbon Monoxide Plug-In Alarm lets you monitor carbon monoxide levels nearly anywhere. Simply plug this personal carbon monoxide detector into any standard outlet, and the backlit digital display will show the level of carbon monoxide in the room. A battery backup sustains the CO detector in the event of a power outage, and a power level indicator on the display and end-of-life timer let you know when the device needs to be replaced.Simple plug-in design with battery backup for uninterrupted protectionPlugs into any outlet and features battery backup.Easy to read backlit digital display shows at-a-glance readings for power and CO levelsSingle test/silence button for simple operation.End-of-life timer signals when the CO detector needs replacing.