10 Dec 2007 3:37 PM:

The alarm you are talking about is called RejaGard. It is the only one of it's type on the market and can be found at

The length of alarm sound is determined to some extent by the state of the battery. What people like about it is that it detects intruders BEFORE they get in rather than AFTER they ARE in like conventional alarms.

Thread: Grille & door alarms could be a great deterrant.

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