This indoor/outdoor dome polycarbonate cover protects devices such as dual action pull stations, keypads for entry systems, intercom stations, emergency buttons, electrical light switches, duplex plugs, etc., against vandalism accidental damage without restricting legitimate operation. When cover is lifted, a loud warning horn sounds locally. Immediate attention is drawn to the area before a false alarm is pulled. Cover options: dome or low profile, with or without horn, flush mount, surface mount or waterproof back box models. Maximum protrusion is 4 inches deep. Offers excellent protection against physical damage (both accidental and intentional) and against severe environments inside and outside. The tough cover is ideal for schools, colleges, hospitals, nursing homes, stores, hotels and public buildings of almost every kind where there is a threat of false alarms.