I imagine it's pretty accurate. I know the detectors are top notch. "For most vehicles, the readings will be within 100 milliseconds "out of the box," and within 50 milliseconds after fine-tuning setup items for the specific car."
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Its pretty damn accurate. It knows the instant your car starts rolling any direction. Though I wouldn't waste the money. It was cool to have for the first couple days. But unless you are continually tuning, then it tells you all the same information. Would be handy if you are training for the strip. Very accurate. Also, takes a while to calibrate with proper vehicle weight and coefficient of drag.
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