First Alert CO400B6CP Carbon Monoxide Alarm, 30 to 5000 ppm, 4 to 240 min Response, 85 dB, Alarm: Audio, Ceiling, Wall

The First Alert CO400 battery-operated carbon monoxide alarm utilizes an electrochemical carbon monoxide sensor to detect carbon monoxide. This carbon monoxide detector is battery-operated, making it portable and easy to use, even in the event of a power outage. When carbon monoxide levels become elevated, a loud 85 dB alarm alerts you to the threat.

Features:

• Detector features a single test/silence button for efficient testing
• Battery-operated detector is portable
• Loud 85 dB alarm sounds when CO levels are detected
• CO detector alerts you to carbon monoxide