The introduction of the Ten- Year Series of Carbon Monoxide Alarms further solidifies First Alert"s endeavor to improve health and bolster the overall safety of you and everyone closest to you. The CO910 Carbon Monoxide Alarm features an unprecedented ten year life span that complies with the Current 10-Year Legislation. A leap in technology has eliminated the need to ever power or charge this unit with batteries. This allows for a decade"s worth of uninterrupted protection. An end of life signal will readily alert owners once the unit has reached its ten year capacity. Attain absolute peace of mind with the utilization of an Electrochemical CO Sensor that"s proven to be the industry standard for excellence in the identification of carbon monoxide. The addition of a fully powered LED and Alarm Indicator serve admirably in warning all nearby participants of a leak in CO. A near infinite amount of installation options are available with the inclusion of an Easy Sliding Mounting Bracket. Combine this with the unit"s sleek and thin design and you have an alarm that can be installed in nearly any setting. Half the size of competing models and a decade"s worth of protection reinforce First Alert"s endeavor to deliver products that excel in protecting what matters most. Includes a 10-year limited warranty.