First Alert SA304 - Smoke sensor - battery powered

This alarm boasts a bright escape light, that illuminates a path to safety, when alarm sounds. This is extremely useful dealing with slow smoldering fires, that can fill the home with thick smoke. Mute button silences nuisance alarms, caused by cooking smoke or shower steam. The alarm provides an easy-access drawer for the battery with no need to remove it from the ceiling. Escape light shines to lead to safety 10-year limited warranty Includes 9V battery & mounting bracket Loud 85dB alarm Model number SA304CN3 Ionization smoke-sensing technology with enhanced smoke-gathering design Side-load battery compartment & theft-prevention lock Smoke detector features single test/silence button for simple operation