Interconnect Hardwire Smoke Alarm with 10-Year Battery Backup

Works with SC5 Smart Alarm Interconnect multiple First Alert SMI105-AC Smoke Alarms together to help provide an early warning throughout your whole home and have peace of mind knowing the 10-year battery backup provides continuous protection in the event of a power outage. First Alert's Precision Detection advanced sensing technology complies with the latest industry standards to reduce cooking nuisance alarms and provides early warning in the event of a home fire emergency 10-Year battery backup provides continuous protection during power outages Through early warning interconnect, when one alarm sounds, all compatible* alarms will sound End-of-life warning lets you know when it’s time to replace the hardwire detector Test/silence button for efficient testing to ensure alarm is working properly