Here is my old Kyosho lap counting system release for the mini z cars line. It is complete with transponders that have to be fitted in every mini-z car. It works with infrared rays.
It is been released for the Kyosho mini-96 track. The kit comes also with dedicate software, for microsoft windows, for get the time of every car - on the track - and so make a true championship. It is a old hardware; the lap counting have to be fitted to a pc via serial port.
It is an amazing item.
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Kyosho Lap counting system
Category → Kyosho Lap counting system » Kyosho , mini z , rc » Japanese RC Cars