OBD2 Scanner 3 in one provides information about your vehicle in real-time. The integrated Trip Computer provides real-time feedback while simultaneously tracking three sets of trip data. The digital Gauges give you real -time data for your vehicle and the buikt-in scan tool allows you to readtrouble codes and diagnose potentially expensive problems before they get out of hand. All this in a small and simple to install unit that can be easily moved from vehicle to vehicle