The battery-powered Carbon Monoxide alarms, CO2 detectors utilize an electrochemical carbon The First Alert CO400 Carbon Monoxide Alarm utilizes a electrochemical carbon monoxide sensor that CO400 - English.The Plug-In Carbon Monoxide detectors alert you to elevated Carbon Monoxide levels in the home. When CO levels become elevated, an alarm alerts you to the threat. Manuals. CO600 - English & Spanish Manual .The First Alert Dual-Power Carbon Monoxide Plug-In Alarm alerts you to dangerous carbon monoxide. This carbon monoxide detector operates on a dual-power system with battery backup for Manuals. M08-152692-CO615-US_WEB_D2 .The First Alert CO605 Carbon Monoxide Plug-In Alarm features an electrochemical CO sensor to alert CO detector alerts you to carbon monoxide; Battery backup allows for continuous monitoring during CO605 - English & Spanish Manual .The battery-operated portable Carbon Monoxide alarms offered by the First Alert are easy to use anywhere, even in the event of a power outage.

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