When you place your post in an existing thread, you are hijacking the thread - something we do not approve of. Always start a new thread for a new topic or question.
Have you tried a search engine like Google? There are many hits using "digital radar speed gun".
Further to the above, given that you require "more information" you infer that you already have "some information". What do you have already? This can serve as a guide to others so they can help you.