First Alert CO410 Battery Operated Carbon Monoxide Alarm Detector First left or right arm

First left or right arm

Regular:135-205 mm circumference X-large:165-225 mm circumference

Premium Japanese cells for longer battery life with no memory effect

Function protection: Yes

Super two-speed rotary motor for performance that pros demand

First Alert CO410 Battery Operated Carbon Monoxide Alarm Detector First left or right armThe First Alert CO410 Carbon Monoxide Alarm uses an electrochemical carbon monoxide sensor. Peak Level feature displays the highest concentration of carbon monoxide measured. When Carbon Monoxide levels become elevated, a loud 85 decibel alarm alerts you to the threat. Designed to be simple to use, the Carbon Monoxide detector has just one button that silences or tests the unit. Because CO evenly distributes itself, it's important to have a CO