Prestige Alarm and Specialty Products, Inc. installs bi-directional amplifiers to keep First Responders and businesses safe in Alabama, including Birmingham, Hoover, Huntsville, Vestavia Hills, Mountain Brook, and Trussville. Bi-directional amplifiers are needed because they increase radio frequencies in areas of buildings where the signals are weak. There are often places in buildings where radio frequency is weak or non-existent, such as in basements, parking garages, and stairwells. There are often areas in a building's interior where there are dead spots. The bi-directional amplifiers solve this problem by increasing the radio frequencies, allowing for First Responder communication. The bi-directional amplifiers have improved safety so much, they are being required in new building construction.