First Alert Battery-Powered Ionization Smoke Detector

The First Alert 0827B sealed lonization smoke alarm features a 10-year sealed lithium battery, eliminating the need for battery replacements during the lifetime of the alarm. This smoke detector with ionization sensor has a tamperproof design, a mute feature, a power LED and alarm indicatorand end of life signaland single test button.No battery changes for the life of the alarmTamperproof design prevents battery from being removedComplies with current 10-year legislation in states/cities where requiredIncludes smoke alarm status LED indicator, end-of-life signal and test/silence button