Sparco Rally & Circuit Stopwatch Specifications Developed for both rally and circuit use this Sparco timer is particularly easy to use with a two button system and easy to install thanks to its fixing mechanism on the roll cage or the dashboard. It offers a clear 6-digit time display (hours minutes seconds tenths of a second) has on / off and split / resume functions and allows data to be sent to a computer via a USB port. Very practical this stopwatch can be connected to the vehicle's 12V battery. Instructions for use