9 volt Battery powered Smoke Alarm
This is from First Alert and is a battery powered smoke alarm with ionization smoke sensor. It has a mute feature to silences nuisance alarms from cooking smoke or shower steam. Has a single button also tests alarm functions. It has an easy access battery drawer so there is no need to remove alarm from ceiling to change battery. It comes with a 10-year limited warranty and a 9v Battery. It also meets UL standards.