With endless possibilities, the Speedster uses digital technology and DSP (Digital Signal Processing) to provide accurate real-time measurements to +/- 1.0 MPH. It measures the speed of a baseball from 75 feet away and even has a stat-keeping mode. Additionally, the speed of larger objects like racecars can be measured from 1,300 feet. A more simplified, yet equally effective, option is the Velocity with its easy point-and-shoot operation. Like the Speedster, it boasts +/- 1.0 MPH accuracy. The Velocity can track the speed of a ball from 100 feet. It's the ideal tool for tracking everything from racecars to pitching speeds.