Vehicle theft alarm system

摘要

The system comprises of two units: an alert emitter unit and an alert receiver unit
Whenever an attempt is made to enter the vehicle, the alert emitter unit, incorporated with standard car alarm system, alerts the holder of the alert receiver unit that such an attempt is taking place. The alert emitter unit activates the alert receiver unit, by sending a radio frequency signal (for example at 446MHz band) to the alert receiver unit, even to places where the sound from the standard car alarm would not be heard, such as buildings, shopping centres, offices etc. at a distance of up to a few kilometres.