STI-6400 — Highly effective alarm alerts to any unauthorized exits/entries through emergency exit doors and rear doors. It serves as an inexpensive security device and helps stop theft as well. If the protected door is opened, the unit emits an ear piercing alarm for 30 seconds, three minutes, continuous or annunciator mode (as preset by user). A key operated override will silence the alarm and allow authorized exits. Stopper is fitted with a long life 9 VDC battery. Three year guarantee against breakage of polycarbonate, one year on electronics. For indoor use only.

Learn more about the Exit Stopper® Multifunction Door Alarm from STI.