
It seems that when the car is not moving it is impossible to adjust, and it is clear that it is impossible to control and adjust at the same time. The instructions are written so small that you need a magnifying glass to read them. So you need to have a passenger who has a magnifying glass and is able to get close enough to the driver to adjust things and you have to press the buttons about 10 times to get to what you want to adjust. This starts with the need to adjust the vehicle's speed. At 25 mph heads up says it's doing 12 mph.

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