BRK SMI100-AC Interconnect Hardwire Ionization Smoke Alarm with Battery Backup. Direct wire-in with 9V battery backup. Hardwired with battery backup for protection during power outages. Perfect mount for easy installation. Mounting bracket keeps the alarm secure over a wide rotation range for ideal alignment. Latching alarm indicator, visually identifies unit that initiated alarm or low battery. Interconnects with most First Alert and BRK hardwired alarms. When one alarm sounds, all compatible alarms sound (up to 12 smoke alarms and 6 other alarms). Test/Silence Button, temporarily silence or test the alarm with one-touch easy access button. Dust cover, keeps the alarm clean during construction.Precision Detection advanced sensing technologyComplies with industry standards to reduce cooking nuisance alarmsProvides early warning in the event of a home fire emergencyThrough early warning interconnect, when one alarm sounds, all compatible alarms will soundBattery backup provides continuous protection during power outagesAlarm indicator visually identifies the unit that initiated the alarmQuick Connect Plug included allows for easy installation with no need to rewireTest/silence button for efficient testing to ensure alarm is working properlyEnd-of-life warning lets you know when its time to replace the alarm
