The IntelliTAG distinguishes between normal vibrations (an impact from a ball, someone knocking on the door, etc.) and break-in attempts using patented one-of-a-kind vibration recognition technology. Therefore, you can be alerted and the siren can go off before the intruder has even entered.
It also detects when your door or window opens, as well as attempts to prevent it from operating properly (radio interference, tampering, and an attempt to remove the battery).
For greater peace of mind, it also notifies you if service is needed to keep it operating correctly (low battery level, required recalibration, etc.).