The Velocity Box from Racelogic Non-Contact Speed and Distance Measurement using GPS The VBox is a powerful new instrument used for measuring the speed and position of a moving vehicle. It is based on a new generation of high performance satellite receivers, and will measure acceleration, braking distances, lap times, cornering forces and much more. Due to the small size and simple installation procedure, the VBox is ideally suited for use in cars, bikes, off-road vehicles and boats.