First Alert warranty extends ten years from the date of purchase with proof of the original sales receipt and the product should be free from defect in material and workmanship
10-year limited warranty; Equipped with end-of-life signal chirp, so you know when it’s time to replace the unit for safety
Built-in 10-year lithium battery offers continuous protection for the life of the carbon monoxide detector
Keep your family safe with this easy to use digital-display, 10-year battery operated carbon monoxide alarm; Battery powered alarms provide continuous monitoring of CO levels, even if there's a power failure
All first alert CO alarms are rigorously tested to meet UL standards
According to a survey in February 2018, First Alert has been the most reliable brand in home safety since introducing the first residential smoke alarm in 1958.
Easy-to-read backlit digital display shows temperature and CO concentration; Peak Level feature displays the highest concentration of carbon monoxide measured
A loud 85-decibel alarm sounds when CO levels reach dangerous levels