GPS/GSM Vehicle Tracker combines GSM & GPS technology perfectly, owns compact size and elegant appearance, and carries top technology style. It is the typical model of the combination of communication products and GPS/GSM Vehicle Tracker.    GPS/GSM Tracker is a vehicle remote position device with build-in GPS and GSM/GPRS modules. It is a small size, high accuracy remote location tracking device. Based on GPS satellite, it provides accurate position information under dynamic conditions. Personal remote position device transmit the longitude and latitude coordinate to authorized cell phone. You can use these features for a security purpose and other purpose which needs remote positioning such as asset protection and tracking. Features 1.uild-in GPS Vehicles locator 2.pport 4-frequency GSM 900/1800 MHz. (850/1900 Optional). Works worldwide! 3.igh sensitivity, new technology and latest GPS chipset! 4.cellent for fixing the position even at a weak signal status. 5.rk well even in areas with limited sky view like urban canyons. 6.ry Low power consumption 7.st Signal Acquisition 8.pport single location and continuous tracking 9.pport alarm 10.port quick dialing buttons for 3 preset phone number 11.port check location by SMS and Internet 12.ate the locator holder by the mobile phone via SMS 13. button send out exact location for immediate rescue/action. 14. Lead leads to a total of 4 lines, were red: +12 V power supply、blue: GND、between yellow line and blue line connect external SOS button、green: the line of control cutoff oil, output cutoff oil signal for DC2.8V, the maximum current for 2mA.