Siren Alarm with Strobe for AED Cabinet by JL Industries. Designed for cabinets with at least 3" trim or surface mounted cabinets. 85dB alarm sounds for 2 minutes when the cabinet door is opened. Includes keyed on/off switch. 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 activated and will sound when the door is opened. When the plug is out the alarm is deactivated and will not sound when the door is opened.