Franklin Sports Speed Tracking Pro accurately records the ball speed at a fraction of the cost of a radar gun! Step 1: Select 1 of 5 pitch distances; 24 ft., 36 ft., 46 ft., 54 ft., or 60.6 ft. Step 2: Measure the distance from the pitcher"s rubber to the home plate using the included tape measure. Step 3: Attach the sensor to the ball glove, back stop, return trainer or chain link fence. Step 4: Stand on the foot pad and watch the numbers blink; release your foot simultaneously with the ball release. When the ball hits the target the speed will register on the display.