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.

The unit uses a momentary switch. After initial installation, unit is always on and you do not have to remember to turn it on when you leave a protected area. This model also eliminates having to remember to re-arm it because it is never off. 

When the alarm is triggered, to silence the alarm, insert the key and turn completely to the "RESET" position and hold for 2 seconds, then release. The switch will spring back to its original position and push the key out. To turn the unit off, supply power must be removed. 

Features:

• Highly visible "stop sign" design acts as a deterrent.
• Remains "on" or armed at all times.
• Has a momentary reset option. 
• Sounds a powerful 105 dB warning horn when activated, drawing attention in a hurry (95 dB low volume setting can be set if desired).
• Virtually indestructible polycarbonate housing. 
• Upon installation, user can select whether to use as an alarm or annunciator.
• In exit alarm mode, can be set to sound for 30 seconds, 3 minutes or indefinitely (unless disarmed with key supplied).
• May be programmed for 15-second entry delay or immediate alarm.
• In annunciation mode, alarm announces door entry with a set of 10 beeps. 
• Exit delay allow unit to arm following authorized exits. 
• Unit is completely self-contained.
• May be mounted on top, right, left or next to almost any door.
• Detects both unauthorized exits and entries.
• Easy to install.
• Less expensive than heavy horizontal bar type units.
• Practical for all emergency doors. 
• Compact patented design 5 in. (127mm) in diameter and 1.875 in. (48mm) deep.
• Also available in green housing to comply with newer standards (STI 6400-G). 
• 9-VDC alkaline battery is provided.
• Recommended operating temperature 32F to 120F (0C to 49C).
• Lifetime guarantee against breakage of polycarbonate housing (one year on electronic components).