Safety Technology International, Inc. STI-13020FR Universal Stopper with Horn, Flush Mount and Fire Label, Indoor/Outdoor Polycarbonate Protective Cover for Pull Stations or Call Points Indoor outdoor cover protects against vandalism and intentional or accidental damage 105 db self-contained alarm helps scare off pranksters and vandals Protects pull stations and call points from damage Cover molded from thick tough polycarbonate material Three year guarantee against breakage of the polycarbonate in normal use (one year on electro mechanical and electronic components).