First Alert CO400 Carbon Monoxide Alarm, 10 ft, 85 dB, Alarm: Audible, Electrochemical Sensor, Wall
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The First Alert CO400 carbon monoxide alarm utilizes a electrochemical carbon monoxide sensor that lasts for up to 5 years to detect carbon monoxide. This carbon monoxide detector is battery powered, making it portable and easy-to-use anywhere, even in the event of a power outage. When carbon monoxide levels become elevated, a loud 85 dB alarm alerts you to the threat.