Kidde Worry-Free Smoke Alarms, 2 pk. - White

Provides reliable protectionSealed-in lithium battery powers the alarm for up to 10 yearsPhotoelectric-sensing alarms may detect visible fire particles faster than ionization alarmsAutomatically activates when attached to the mounting bracketSmart Hush silences nuisance alarms for approximately 10 minutes and won't allow Hush features unless the unit is in Alarm modeIf the alarm has sounded since the last time the test/reset button was pressed, an LED will flash rapidlyRed LED blinks with the alarm soundEnd-of-life warning alarm chirps every 30 seconds, and can be silenced for 3 days at a time for up to 30 days until it's convenient for replacingUL listedIncludes 2 smoke alarms with sealed-in batteriesWarranty: 10 years limited