The kidde k10c professional series alarms can interlink with up to 24 interconnectable alarms which means that all alarms will sound if any detect smoke or heat detects invisible fire particles associated with fast flaming fires it is 230 volt mains powered with a battery back up in the event of a power failure a hush button allows temporary silencing of nuisance alarms caused by cooking or steam and resets automatically in addition this button is used check the alarm operation the alarm has an