First Alert Smoke Detector Alarm | Hardwired with Backup Battery, 6-Pack, 9120B
First Alert Smoke Detector Alarm | Hardwired with Backup Battery, 6-Pack, 9120B
BRK First Alert Contractors 6-Pack SMI100-AC Hardwired Smoke Alarm – MFG 2026
The detector features an ionization sensor for detection of smoke and fast flaming fires, as well as a loud, 85 decibel alarm. One button silences any nuisance alarms, and also tests detector functions, while lights indicate if the alarm detects smoke.