STI® Exit Stopper Multifunction Door Alarm

Inexpensive Security for the Home or Commercial Facility

Low Price Guarantee


What's special about this multifunction door alarm?

  • Emits a deafening 105 dB alarm when your door is opened
  • 3 time modes: 30 seconds, 3 minutes, or continuous (until disabled by user)
  • Choose between standard, double door, or dual mode (for exit and entry)
  • Easily installed and runs off one 9V battery (included)
  • Ideal for preventing unauthorized access or notifying personnel of an emergency in a commercial facility
  • Click for More Features

The Exit Stopper® by STI picks up where your other security devices leave off. Install it onto unauthorized entry/exit point in your facility and it belts out a piercing 105 dB siren that you simply can't miss, unless you're working in a 105 dB siren testing facility... but what are the chances?


Do not use this alarm outdoors!

SSTI-6400 Exit Stopper Door Alarm for Standard Doors 105 dB Red or Green
SSTI-6402 Exit Stopper Door Alarm for Double Doors 105 dB
SSTI-6406 Exit Stopper for Both Sides of a Door 105 dB
  • Delay mode lets you exit before it arms
  • Nearly indestructible polycarbonate housing prevents vandals from disabling it
  • Compact design fits any door without being obstructive
  • Makes a great cost-effective alternative to horizontal bar alarms
  • Includes a warning label to prevent entry and exit


NOTE: Do not use this alarm outdoors!

Property Value
Warning Horn Low: 95 dB
High: 105 dB
Relay Contacts Form C Dry 0-30 Volts
AC/DC, 1 Amp
Stanby Current 10 uA
Alarm Current 200 mA
Operating temperature Range -40° to 250°F
(-40° to 121°C)
Reccomended Operating Temperature 32°F to 113°F
(0°C to 45°C
Dimension 5.375 in. x 5.375 in. x 2 in.
(137 x 137 x 51 mm)
Housing 1/8" Polycarbonate
Ratings FCC Compliant
IC Compliant
CE Approved






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