With topspin and underspin and stands about 8" taller. Startup time delay, groundstroke to lob trajectories, ball ejection speeds 10-85 mph, 1.5-12 sec. ball feed rate, heavy-duty battery that provides 4-6 hours court time (typical). Built-in oscillator. The only portable ball machine that displays the Elevation setting on the control panel. Holds 150 balls. Built-in oscillator. 4-6 hours court time heavy-duty battery.