Now you can turn any backyard into an instant batting cage with the portable Heater Crusher Curve Mini Lite-Ball Pitching Machine. This machine pitches fastballs and curveballs to you at adjustable speeds of 15 to 45 miles per hour. The Crusher uses mini lite-balls, a soft alternative that are 2/3 the size of regulation baseballs. Mini lite-balls help you to improve your aim and accuracy, and provide a safe alternative to hard balls. Also, because the balls are light, they only travel 20 or 30 feet so you can improve your hitting anywhere!