Well... Say you stop on a deserted road, push the start button and the top yellow comes on, the about 5 seconds later the stage light comes on and the countdown begins. Maybe it has a G meter built in so it knows when you take off and after a 1/4 mile it then would display your reaction, 60', 1/4 times and speed. I bet there is something like that out there but whenever I Google it all I find are ones for your PC that you just click a button with your mouse to stage and click again to go and it gives you a reaction time.. what good is that?
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