With more than 100,000 unit of VT300 entry level GPS vehicle tracker sold to 80 countried in the world for famous application,we can say VT300 entry GPS vehicle tracker is the most reliable and robust and cheap GPS vehicle tracking device in the market.VT300 is entry level GPS vehicle tracker focus on car security.VT300 can support detect engine is off/on, control door/windows/engine, geo-fencing ,SOS alert, lower battery  alert.          GSM / GPRS        Global Positioning System Real-time dynamic reporting based on time intervals or distance driving       Quad Band GSM/GPRS 850/900/1800/1900 Mhz          SOSRelief Panic button to call the Board    Speeding alert Excessive speed and mileage battery built-in alarm    GeoFence Personal Geography network capability, and input / output report             Features： Low cost, reliable entry level GPS vehicle tracker SIRF III high sensitivity GPS receiver One discrete input, can detect the engine off/on GPS antenna tampered or jamming detection and alarm  One discrete output, can control door/windows/engine Geo-fencing Panic button alarm Low battery alert