Gtech is not an ordinary tracker, its gsm/gps car security system.

If one touches/vibrate the car or try to open the door, you will receive sms alerts on your mobile phone.

Yyou can switch off the vehicle by your or any other mobile phone. 
 
In case of the theft of the vehicle can listen the voice inside the car.

You can operate from out side city.

If the battery terminal might be disconnected from the gtech system, then its internal back-up is capable to work for hours.

PIN code can be changed by the car owner. Car can be located (optional).