Life Safety Alarm for AED Cabinet by JL Industries. Designed for JL Industries cabinets. 85dB alarm sounds when the cabinet door is opened and is deactivated when the door is closed. Powered by a 9-volt battery (not included).The plug on the alarm acts as an alarm switch. When the plug is in the alarm is deactivated and will not sound when the door is opened. When the plug is out the alarm is activated and will sound when the door is opened.