The Sports Tutor Pickleball Tutor (AC - Random Oscillation) is a portable ball machine that performs with consistency and quality. The machine includes a five second set-up, variable ball speed, variable ball feed rate, start-up time delay, and a full range of trajectories to help you practice any type of shot. This configuration of the machine is battery-powered. This Random Oscillation configuration feeds to random locations to keep you on your toes. Item is drop shipped from the manufacturer.