Hardwired Smoke Detector with Battery Backup | 120V AC Interconnectable Alarm

Upgrade your home’s fire safety system with this Hardwired Smoke Detector featuring battery backup, silence button, and latching indicator. Designed for reliability and fast smoke detection, this 120V AC interconnectable alarm is the perfect replacement for the trusted BRK 9120B model—offering the same dependable performance with enhanced features.

Ideal for bedrooms, hallways, and common areas, this smoke alarm interconnects with other compatible units to provide whole-home alerts. The battery backup ensures continuous protection during power outages, while the silence feature allows for quick response to non-emergency alerts, like cooking smoke. The latching indicator helps identify which unit triggered the alarm, saving you time and confusion.

✅ Direct replacement for BRK 9120B
✅ 120V hardwired with 9V battery backup
✅ Interconnectable with compatible alarms
✅ Silence button & latching indicator
✅ Quick installation – perfect for retrofits or new systems

Trusted fire protection, upgraded for today’s homes.

New Model: Replaces 9120B

Interconnect Hardwire Smoke Alarm with Battery Backup

• Direct wire-in with 9V battery backup. Hardwired with battery backup for protection during power outages.
• Perfect mount for easy installation. Mounting bracket keeps the alarm secure over a wide rotation range for ideal alignment.
• Latching alarm indicator, visually identifies unit that initiated alarm or low battery.
• Interconnects with most First Alert and BRK hardwired alarms. When one alarm sounds, all compatible alarms sound (up to 12 smoke alarms and 6 other alarms).
• Test/Silence Button, temporarily silence or test the alarm with one-touch easy access button.
• Dust cover, keeps the alarm clean during construction.