GPS jammer are widely used by drivers when they are involved in the theft of taxi fare, fuel, load, or by criminals in vehicles hijack. Detector of GPS jammer can be connected to the visually any GPS/GSM telematics devise and integrated into the vehicle tracking software. As soon as was detected jamming the GPS signal, it sends a signal about the event of jamming, helping to determinate the last coordinates.It can be used with almost any vehicle tracking, security or alarm system which use the GPS/GPS technology and Bears available digital input.