BRK® Smoke Detector Alarm, Hardwired, Series: 9120, 120 VAC Power Source, 10 ft Detection, Ionization Sensor, Alarm: Audible Alarm, Up to 18 Units Interconnection, 85 dB Alert, LED Visual Alert, 10 to 90 % Humidity, 2 Sensors, Quick-Connect Wiring, 40 to 100 deg F Operating, White, 5.58 in Dia x 1.97 in H.

The BRK 9120BA Hardwired Ionization Smoke Alarm with Battery Backup is more than just a standard fire detector—it’s built to deliver continuous, reliable protection for your home or building. With its ionization sensor technology, it responds quickly to fast-flaming fires, giving your family valuable time to react. The hardwired design ensures dependable power, while the 9V battery backup provides safety even during power outages.

This alarm is interconnectable with up to 12 compatible BRK and First Alert units, creating a whole-home safety network so every room is covered. Its tamper-resistant locking pins and silence/hush feature make it ideal for multi-family residences, rental properties, and dormitories where reliability and low maintenance are essential.

By choosing the 9120BA smoke alarm, you’re investing in peace of mind, code-compliant fire protection, and long-lasting durability trusted by homeowners, property managers, and institutions alike.