With its extended ball track attached, the Gold Model can automatically feed up to 6 volleyballs. This frees a coach or player form being the designated ball feeder. It also makes it possible for players to practice on their own. A simple control knob allows you to adjust the delivery rate from 5 to 20 seconds between balls. Variable speed control allows you to adjust the speed of the ball from a slow serve to a 60 MPH serve. Pivoting head allows you to vary the trajectory. Compact design, weighs 35 pounds, and measures 29" x 22" x 13". Built-in carrying handle. One year warranty on both parts and labor. Made in the USA.