It's not how hard you swing, but how well you swing! Optimize your hitting performance with your own personal radar velocity sensor. The Swing Speed Radar™ from Sport Sensor measures baseball/softball bat speed to help players optimize their swing mechanics. Determine your optimum swing and bat selection for your best distance, quickness and bat control/ball contact. Increase your swing speed to increase your distance. Monitor your swing consistency. Include velocity feedback when trouble shooting your swing. Measure your swing speed improvement as you optimize your swing mechanics. Powered by three AA-size batteries, the Swing Speed Radar™ is microprocessor-controlled, and indicates calculated miles-per-hour bat speeds, ranging from 30 to over 200 miles-per-hour, on a large easy-to-read liquid crystal display.