The SKLZ Hurricane Baseball Trainer Category 4 designed for baseball or fastpitch swing training and it allows you to develop swing power, technique and speed. You can have a stationary or moving target. It has additional power band (4 total) for fast-back action, and a high visibility impact head. Use it for solo tee practice or as a dynamic moving target for immediate feedback on your swing, it will improve your batting average and slugging percentage. The swingaway has a ball attached to bungee cords and allows for an easier time to have more swings then a tee. Its height extends from 29″ to 43″ for virtually any size and aged player.