Highly effective, alarm alerts you to any unauthorized exits/entries through emergency exit doors and rear doors. Serves as an inexpensive security device and helps stop theft as well.
* Highly visible "stop sign" design acts as a deterrent.
* Unit is completely self-contained and easy to install.
* Sounds a powerful 105 dB warning horn when activated, drawing attention in a hurry (95 dB low volume setting can be selected if STI16400 desired).