Measures Speeds up to 120 MPH!Press start, throw the ball, and the LCD indicator displays pitch speed in MPH upon impactOfficial size and weight of a regulation baseball, but used as a training aid for any age or skill levelMeasure distance between pitcher and catcher with included measuring string and choose one of eight predetermined distances (20-80 Feet) into Speed SensorGripSense technology begins to record the speed automatically the moment the ball is releasedFor throwing only, not to be hit with a bat or on hard surfacesBuilt-in Speed Sensor Records How Fast You Throw The Ball - Used As A Training Aid For PitchersPress Start and throw the ball - Speed Sensor has a built-in device that begins to record the pitch speed at the moment the ball is released. Upon impact, the LCD indicator displays the speed, up to 120 MPH! Baseball (available in 9 and 9 KM/H) and Softball (available in 11 and 12) models.Technology Helps Improve Your TechniqueThe unique patent pending technology, called GripSense begins to record once the ball leaves your hand. By evaluating the speed of the ball, you can learn to improve your pitching technique and increase your speed. To program the ball, press the start button and scroll through the programmed pitching distances. Release the start button when the desired distance is displayed. Press and release the start button once more to activate the ball. Use the enclosed string to measure the distance to be thrown and then set the distance on the ball. Eight baseball distances in feet include 20, 30, 40, 46, 50, 60.5, 70 and 80 ft. Three softball distances include 40, 43 and 46 ft.Choose from 9 Baseball and 11 & 12 SoftballBaseball and softball players can train at several different distances. Be sure that the distance thrown is the actual distance programmed into the ball! This ball is designed for training. External factors may affect ball speed readings. Not all readings will reflect 100% accuracy. U.S. Patent # 4.755.948 China Patent# ZL.99.2.01505.7 Japan Patent # 3060790.The Speed Sensor is used to improve pitching technique and speed. It is of standard size, shape, and weight. Patent pending in US, Taiwan, Japan and China). This ball measures in feet and miles per hour (mph). Warning: The Speed Sensor contains delicate electronic circuitry. Do not hit with a bat or throw against any hard surface. Do not expose to water or extreme humidity. This will damage the ball.