This Pitch Velocity and Accuracy Umpire pitch-training device from Hammacher Schlemmer measures pitch velocity, calls balls and strikes, and simulates at bats. The built-in sonic radar measures speed from 20-99 mph from 45′ or 60′ 6″ away (the Little League and Major League Baseball pitching distances). It can also be used with fast-pitch softball at 40′ or 43′. It has a durable 16-gauge steel with stainless steel hardware, and it operates up to 100 hours on 4 D-cell batteries. It even folds up so you can take it to the practice fields. It’s $399.95 from Hammacher Schlemmer.