First Alert 9120B Smoke Detector, Hardwired Alarm with Battery Backup

Description

First Alert 9120B Smoke Detector, Hardwired Alarm with Battery Backup

• The First Alert 9120B Smoke Detector is a hardwired fire alarm designed to deliver reliable, continuous smoke detection for enhanced home safety. Its ionization sensor responds rapidly to fast-flaming fires, making it ideal for areas like bedrooms or hallways. Installed directly into your home’s electrical system, it includes a 9V battery backup for uninterrupted protection during power outages. The unit features a single test/silence button, a latching indicator to pinpoint the alarm that was triggered, and the ability to interconnect with up to 12 other First Alert devices—so when one alarm sounds, they all do.