BRK AC/DC Smoke Alarms
120V with 9V battery back-up in side drawer.
Fatest installation available. Green LED under test button indicates 120V power; red LED
flashes once every 60 seconds to indicate battery power. When interconnected units alarm;
the red LED on the initiating alarm will flash rapidly; the other unit's red LEDs will be
off. Ionization sensor
Order Model: BRK 4120B |