TAMIYA 15183 Mini 4WD SPEED CHECKER
This is a TAMIYA Mini 4WD Speed Checker that allows racers to check the performance of their race car. The checker can be selected to check overall speed in kilometers per hour. It can also be configured to run a simulated race distance whereby your machine will record a time based on the selected simulated track length.
Requires two AA batteries to operate. Sold separately.