The smallest, lightest professional ball machine is packed with features. Variable ball speeds from 10 - 60 MPH. Variable ball feed from 2 - 10 seconds between balls. Adjustable trajectory from ground strokes to towering lobs. With the flip of a switch the Tennis Tutor ProLite will deliver shots randomly across the entire court. Built-in battery with charger (battery model only). Easily transported. Holds 125 balls. Available with AC or battery power supply. Battery life is 2-3 hours.