Competition G Tech Pro - Like a dyno on your dash. Utilizes 3 precision accelerometers to measure changes in speed and distance. Records up to 30 runs, review them on your PC (software included for Windows 98 or newer with a screen resolution of 1024 x 768 or higher). Measures Reaction-Time, 0-60ft time, 0-330ft time, 1/8 and 1/4 mile E.T and speed, Horsepower, torque, RPM's, braking distance, handling, acceleration and braking G's, RPM vs time graph, HP & torque vs RPM graph, speed vs time graph, speed vs distance, G's vs time graph and more.