As far as I can see this determines how many amps your motor draws from the track in whatever set-up you have in your chassis. As a gadget this, like the chassis heating plate, attracts me but is it really information that will help as I can already measure RPM and magnetic power using the DS pocket checker?
I do like the chassis heater though, save me having to sheepishly put my chassis in the oven overnight so avoiding the "your sad" looks from my wife!
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