Topshine Information Technic Co.,Ltd is one of the leading China vehicle gps tracker vt310n manufacturers,Website:http://www.topshine-gps.com, equipped with a productive factory, welcome to wholesale cheap truck tracking, tracking system for cars, tracking system for vehicles, taxi gps tracking device for vehicles, vehicle tracking systems from us.* Real time tracking by SMS or by GPRS* High sensitive external Antennas, easy installed and concealment. * Engine idle alert / low power alert / power failure alert* Harsh acceleration/braking alert (Optional)* Cut off engine by SMS gradually for safety* Anti-robbery with SOS button, call for help* Power saving / GPRS data saving design, low battery alert* Fuel monitoring (Optional) /fleet management * Accident alert(optional crash sensor)* User can check the car's physical address (city,street,etc) name by SMS (optional, need to be set on GPRS01 Platform)   * Movement Alert, Geo-Fence Alert, over-speed Alert* Locate by SMS with Google map's link* Suitable for any 9V-36V vehicles (12/24V suggested)* Inbuilt 4MB data logger for GSM blind area (save more than 16,000 way points)* With 850mAh inbuilt rechargeable battery* RFID automatic anti-theft (Optional)* GPS industrial high sensitive module* Temperature Sensor/door sensor/alcohol sensor supportedModelVT310NVoltageDC 9V~36V/1.5ADimension117*85*26mmInput5 digital input, 3 low-level effective, 2 high-level effectiveNet weight180gOutput5 digital outputBack-up battery950mAh/3.7VAnalog input2 ch*12 Bits,for fuel sensor..etcPower consumption50mA standby currentMIC portYesMotion sensorYesRS232YesFrequency bandsGSM 850/900/1800/1900Memory4 M BytesAntennaExternalGPS sensitivity-161dBmGPS cold start29 secGPS warm start5 secGPS hot start<1 secPositioning Accuracy5 m CEP