= First Alert Smoke Alarm Hardwire Adapter Battery Backup 9V 1039809 9120B

Brand: First Alert. Model: 9120B. The 9120 Series smoke alarms have been designed to install faster, perform better and be even smarter than before. These improvements help reduce nuisance alarms and save you time and money. Single button test/silence. 9V Battery Backup. Latching alarm indicator - remembers which unit initiated an alarm. Smart Technology - helps reduce the number of nuisance alarms. Perfect Mount - allows for easy alignment of alarm. Dust Cover. Easy Installation/Maintenance - Preferred features include a large opening in the mounting bracket for easy access to wiring. Keyhole slots in the mounting bracket eliminate the need to remove the electrical box screws for installation. A battery pull tab keeps the battery fresh until the home is occupied.