The ProLite Plus ball machine by Sports Tutor has all the features of the original ProLite, plus the option of topspin at the push of a button. The ability to adjust the settings for ball trajectory, speed, and feed interval, and 110 ball capacity are the basics to keep even the advanced player satisfied. Then, at the push of a button, use the oscillator to randomly shoot balls across the court and top-spin at a level hit by most intermediate to advanced players. The built in rechargeable battery ensures that you can train at this high level for 2 to 3 hours at a time. This fully featured ball machine leaves little to be desired when it comes to developing your skills.