I came across this while thinking about how they measure baseball pitch velocity and thought it might just be a fun gadget to have. You can simulate a police officer and check the speeds of oncoming cars (of course not really simulating them!). This model was a top of the line wireless version and has a long distance range.

Apparently the Stalker Sport SPO3 Cordless Premium Package Radar Guns is the #1 choice for Professional Baseball and other sports teams worldwide. I understand now that baseball scouts sit more than 200 feet away from the pitcher so having 3x the power of any competing radar gun, the Stalker SPORT is able to measure the ball speed up to 350 feet away!

Control Panel

Case (looks very James Bond)