The Magnetic Window Alarm is only 2 1/2 inches long, and possibly the world's smallest window alarm that protects your home from intruders. This unit uses a magnetic sensor to detect the opening of a protected window. A 105 dB alarm will then alert you to an attempted entry and scare off potential intruders. The owner may open the window or other protected object, without setting off the alarm by inserting a deactivation key. Anyone else who activates the alarm will not be able to turn it off without this key.

May also be used within the home to alert parents to children opening a gun or medicine cabinet or used to protect exterior doors, particularly those hard to protect sliding glass doors. Commercial uses include show cases and cash registers. Batteries included.