First Alert CO400 Carbon Monoxide (CO) Detector, Battery Operated Alarm English Blazer known for its activity on

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First Alert CO400 Carbon Monoxide (CO) Detector, Battery Operated Alarm English Blazer known for its activity onKeep your family safe with this easy to use, battery operated carbon monoxide alarm; Battery powered alarms provide continuous monitoring of CO levels, even if there's a power failure Features an advanced electrochemical carbon monoxide sensor that accurately detects carbon monoxide levels, no matter where the detector is placed in the room. The alarm sequence should last 5 6 seconds. If it does not alarm, make sure fresh batteries are correctly