Meet the Ball Coach Radar Gun: a palm-sized training tool that gives you instant feedback on how you can improve your performance. It has a hands-free mode that lets you focus on training and coaching. This speed training tool gives you information on your hitting power, pitching speeds, throwing speeds, serving speeds and shot speeds. Its built-in memory keeps track of your last 25 speeds.
The Radar Ball Coach can measure speeds up to 130 MPH. It has a 120 feet range. The battery life lasts for over 2000 readings or over 1 hour in Constant-On Mode with AAA alkaline batteries. Not cheap but quite a handy tool for athletes and their coaches.