gps for car Working Based on existing GSM /GPRS network and GPS satellites, this tracker is a small and powerful tracking device that is developed for personal, vehicle and pet etc. Not only transmitting the longitude and latitude coordinate to your cell phone by SMS, but also transmitting the longitude and latitude coordinate to the designated server by GPRS and then displaying the location by tracking software. Main Feature: 1.Real-time tracking by SMS/GPRS 2.Locate in cell phone 3.History replay 4. Support hand-free phone call 5.Listen in function 6.Door detective 7.ACC detective 8.SOS alarm 9.In or out Geo-fence alarm(5groups) 10.Speeding alarm 11.Power-lost alarm 12.Cut off the circuit or fuel 13.Customize available