Hello, I noticed today that the speed indicated by the vehicle is basically exact the GPS speed. I just wanted to see how far the speedometer is moving forward, but then the first measurement result coincided with the speedometer. We then installed several apps on my girlfriend’s smartphone and always the same result. An app even showed decimal places and showed a deviation of 0.4 km/h. The speedometer therefore goes minimal Can it be that a tacho is so precise? Is that so with you? By the way, the measuring window was between 20 and 130 km/h.