This inexpensive, supervised wireless cover with sound was created to mount directly onto STI's Stopper Station buttons. When ordered with a Stopper Station the push button shell will have two notched slots for mounting the shield. The shield takes hard knocks in stride while protecting the button against vandalism, damage or accidental activation and because the shield mounts directly to the Stopper Station it is ideal for use when space is limited. When the cover is lifted to gain access to the button, a selectable 65 or 85 dB alert sounds. Immediate attention is drawn to the area and a prankster will either run or be caught. As all STI protective covers, this Stopper Station Shield is backed by a three year guarantee against breakage in normal use. It is also highly cost effective and easy to install.