The smoke alarms are 120V AC hardwired with battery backup. Capable of wiring directly into your home electrical system. Equipped with a mute button to quickly silence your alarm as well as testing its function.
The battery backup provides optimal protection in the event of a power outage. These alarms are also capable of interconnecting with up to 18 (12 smoke, 6 CO/ heat/ relay) other First Alert or BRK hardwired alarms.