STI’s Universal Stopper low profile protective cover is an indoor/outdoor low profile polycarbonate cover that flashes and sounds a warning horn when activated. The cover offers excellent protection against false fire alarms, physical damage, dust and grime, as well as severe environments inside and out. When lifted to gain access to the actual alarm, a piercing warning horn sounds and the cover flashes to help draw immediate attention to the area. The prankster will either run or be caught before a false alarm is activated. The clear cover does not restrict legitimate operation of the fire alarm and helps attract attention in case of a real fire or emergency. Many mounting options, colors and labels are available.