Kidde 2101040 Worry-Free Wire-In Smoke & Co Combo Alarm (Ac/Dc)

This Kidde Worry Free Alarm is a hardwired combination smoke and CO alarm that has a 10 year sealed battery back up meaning no battery replacement required over the 10 year life of the alarm. It features Voice Warning to warn for hazards. It also features Intelligent Sensor Technology and Test/Hush buttons that reduce temporary nuisances alarms can cause. This alarm has peak level memory that alerts users when the unit has detected CO concentrations of 100ppm or higher.