This is a GPS and GSM jammer to be used in a vehicle only from the 3.8v vehicle power supply(Must used our 3.8V car power adaptor)
This unit will stop all vehicle tracking systems from obtaining vehicle position from satellites (GPS) and also then stop the subsequent messaging of vehicle position back to the tracking base (GSM).

Please note that there is  battery in this unit and it can work 4 hours upon a full charge ,It also can  power from the vehicle cigarette lighter/power socket.