The Philips premium defibrillator cabinet feature combination audible and flashing light alarms. They are made of sturdy heavy-gauge steel and tempered glass, and are large enough to accommodate additional medical supplies, such as oxygen. It protects your defibrillator from theft and the elements. You can also connect the cabinet's alarm to your internal security system so that a more coordinated emergency response can be mobilized centrally. Equipped with an audible alarm and flashing lights (powered by two 9-volt alkaline batteries not included), the Cabinet attracts attention to mobilize assistance during a cardiac emergency or deter theft. Opening the Cabinet's door activates the audible alarm and lights. For locations where a siren is inappropriate, the audible alarm can be disabled. In buildings with a central security system, your facilities people, or alarm company, can connect the cabinet alarm to your system for a more coordinated response to a cardiac emergency.The alarm can also be connected to a programmable auto-dialer.