The Uni-Com Garage & Shed Alarm is ideal for helping to protect sheds, garages and other areas around the home. Quick and simple to install with no wiring required. The loud 110 dBA siren is activated when the door is opened and the magnetic contact becomes separated from the keypad. A 10 second entry delay gives you time to deactivate the alarm using your uniquely programmed 4-8 digit security code.