The BRK Model No. 3120B is a wire in, 120V AC 60Hz single and/or multiple station photoelectric and ionization dual sensor smoke alarm specifically designed for residential and institutional applications including sleeping rooms of hospitals, hotels, motels, dormitories and other multi family dwelli...

The First Alert BRK 3120B hardwire dual photoelectric and ionization sensor smoke alarm with battery backup is designed to provide peace of mind. It features photoelectric and ionization sensors that detect not just fast-flaming fires, but also smoldering ones. The 85-decibel fire alarm has two latc...

The First Alert BRK 3120B hardwire dual photoelectric and ionization sensor smoke alarm with battery backup is designed to provide peace of mind. It features photoelectric and ionization sensors that detect not just fast-flaming fires, but also smoldering ones. The 85-decibel fire alarm has two latc...

The BRK Model No. 3120B is a wire-in, 120V AC 60Hz single and/or multiple station photoelectric and ionization dual sensor smoke alarm specifically designed for residential and institutional applications including sleeping rooms of hospitals, hotels, motels, dormitories and other multi-family dwelli...