The kidde professional series alarms can interlink with up to 23 inter connectible alarms which means that all alarms will sound if any detect smoke or heat this k30c alarm detects heat of above 58c class a2 and is recommended to be used in conjunction with interconnected smoke alarms 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