Speed radar detector (speed gun) is dedicated device of traffic police are widely used not only in USA but also in many other countries. This device can help police know the vehicle is moving with a speed exceeding the allowed or not just one shoot! If a person regularly move on the highway ramp, you might have seen the speed radar detector. Perhaps this is a gun did not hurt but makes people lose money. Have you ever wondered how a radar detector record sharp images with accurate speed? This article will summarize the information to answer the question above. How do the best radar detector 2019 work? I am…