First Alert 0827B

The First Alert 0827B Sealed Ionization Smoke Alarm features a 10-year sealed lithium battery, eliminating the need for battery replacements during the lifetime of the alarm. A tamperproof design prevents batteries from being removed. Featuring an ionization sensor for reliable smoke detection, this model meets code for all sealed/tamperproof alarms. The smoke alarm includes a mute feature that lets users to silence the alarm, as well as a power LED and alarm indicator, end of life signal, and single test button for simple operation. A Perfect Mount system allows you to easily align and mount the smoke detector on the wall.