If the manual could be a bit better. Even without "Kalibririerung" agreed with me the distance measurement well. Only this is a "weakening" batteries I would hope yet; I always find it very annoying when the conk while running. Otherwise: Perfect One problem I had with my vendor who sold the unit without original packaging and thus without a manual or battery, without explicitly mentioning this. Respect it, if it is a bit cheaper than OVP!
