The Tennis Tutor ProLite is the smallest and lightest professional ball machine. It is a full-featured yet it stands only 12 inches tall and weighs less than 30 pounds. Patented technology borrowed from the world’s #1 portable ball machine, the Tennis Tutor, makes it possible. Features: Ball Capacity: 125 Ball Speed: Up to 60 MPH Ball Feed: Adjustable from one ball every 1-1/2 secs. (for quick-reaction volleys) to every 10 seconds. Manual Elevation Control: Ball trajectory is manually adjustable from groundstroke to lob. Rechargeable Battery: Built-in battery provides up to 3 hours of playing time per charge. Even more playing time is available with an optional External Battery Pack (sold separately). Smart Battery Charger: Fully charges the battery overnight and shuts off automatically to prevent over-charging. Start-up Time Delay: Allows the player time to get to the other side of the net before balls begin shooting. Oscillator: Delivers shots randomly across the court for hitting on the run. Optional Add-Ons: (Must be ordered at time of purchase.) AC Power Option: All Tennis Tutor ProLite models can be ordered with AC power instead of battery power for a nominal additional charge. ($20) Two-button wireless remote: Starts and stops ball delivery, and controls side-to-side position of the ball throws. ($200) The Tennis Tutor ProLite is backed by a three year warranty covering both parts and labor. Extended warranties available.