iPong Topspin Table Tennis Trainer Robot Table tennis robot for consistent topspin feed, ideal for practicing basic forehand and backhand strokes with adjustable power and spin Holds up to 110 balls; Casts balls at an adjustable frequency (12 to 70 balls per minute) Remote controlled and battery-powered: 6-AA batteries Assembly time: under a minute; Includes iPong, remote control, instruction manual Compatible Accessories: 40mm and 40+ balls, iPong ball catch net, iPong ball pickup net, iPong tilt stand, iPong targets