This heavy-duty recessed AED cabinet is constructed of rugged, 16-gauge welded steel (58% thicker than standard 20 gauge) with a large, 3/16" impact-resistant acrylic window. Features 120 decibel high output alarm (30 sec.) followed by intermittent service tone, high-intensity strobe light alarm, theft deterrent system, continual self-monitoring circuitry (9 volt battery), industrial strength hardware, and powder coat finish with UV protection.