The First Alert Carbon Monoxide Alarm uses a specialized carbon monoxide sensor to accurately measure and alert you to deadly carbon monoxide build-up. This battery powered unit can be mounted anywhere, even when there is no electrical source available. The sensor unit lasts up to 5 years with normal use. When dangerous carbon monoxide levels are detected a loud 85 dB alarm alerts you.
Compare our price of $19.99 to FIRST ALERT at $26.99 (model number: CO400). Save 26% by shopping at Harbor Freight.