Proven effective for over 40 years, this protective polycarbonate cover has been helping to stop false fire alarms around the world, without restricting legitimate alarms. This surface mounted 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. 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.