STI’s multifunction door alarm helps prevent unauthorized exits and entries of fire/emergency doors. Exit Stopper alerts if a protected door is opened by emitting a 95/105dB alarm for 30 seconds, three minutes or continuously. Annunciation mode announces door entry with a set of 10 beeps and resets. When used in alarm mode, a key operated override will silence the alarm and allow authorized exits. This alarm can serve as an inexpensive security device and help stop theft. It is also available in supervised wireless.