Safety Technology International, Inc. announces the addition of clear Heated Polycarbonate Enclosures, which protect keypads, annunciators and other electronic products, to their Stopper® Line of protective covers. The covers are ideal for protecting a wide range of devices, components and sensitive units from vandalism and accidental damage as well as weather, dirt, dust and grime. These new STI Heated Polycarbonate Enclosures are designed to maintain a temperature above freezing which allows the protected unit to be installed outdoors, in freezers, unheated warehouses or storage units. The radiant heat plate prevents LCD displays from becoming sluggish or freezing. They offer a choice of 12, 16.5 or 24 volts and have three thermostats; a control thermostat, over temperature safety thermostat and a low temperature warning that can connect to a supervisory panel. The enclosures come with an external thumb lock or key lock and have a choice of two enclosed backboxes. Backbox "A" provides 4.25 inches of depth and backbox "F" provides 2.0 inches of depth. The internal clearance for the keypad or other electronic device is 5.5" height by 7.5" width. The enclosures are backed by a lifetime guarantee against breakage in normal use (one year on electronics). Mounting hardware and gaskets are included.