Standard Key activated alarm which is activated when door is opened to remove the defibrillator. The alarm sounds at a piercing 110 db. Protect your AED with a cabinet of high quality sturdy metal construction. Deters theft while prominently displaying your AED. Simple to install and ideal for all indoor applications. Non-locking - allowing quick access to the AED in the event of an emergency. Ideal for all aeds. This brand fits ALL aed / defibrillators with cases. Size: 16.5" x 16.5" x 7"