Dragy GPS Based Performance MeterDescription Monitor your 0 60mph, 1 4 mile, 60 130mph, 100 200kmh, 1 2 mile performance, and more! Dragy uses multiple high speed GPS satellites to accurately measure the performance of your vehicle within 1 100th of a second, producing identical results to the much more expensive and cumbersome Racelogic Vbox system, in a less expensive and easier to use package. The Dragy software automatically charts slope on all timeslips which you can then post