First Alert SMI105-AC, Interconnect Hardwire Smoke Alarm with 10-Year Battery Backup, 1-Pack

First Alerts Precision Detection advanced sensing technology complies with new 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, Alarm indicator visually identifies the unit that initiated the alarm, End-of-life warning lets you know when it’s time to replace the alarm