The Lobster Elite Liberty Ball Machine allows you to take your training to any court with this portable system that features a 2-hour battery life. Mix it up with 20-80 mph ball speeds, heavy top and back spin, or random horizontal oscillation. Designed for a 150 ball capacity to meet the needs of beginners to intermediate players. Ideal for advanced control of both ball speeds and ball spins. Features a manual hand crank for elevation. Groundstrokes to lobs. 2-12 second ball feed rate. Storage Dimensions: 24 x 16 x 19 inches. Ready Dimensions: 24 x 16 x 31 inches. 2 Year Warranty - Parts & Labor (Unless Misused) 1 Year Warranty - Accessories 6 Month Warranty - Battery & Replacement Parts Don't forget the Tennis Balls! Lobster Ball Machine Comparison Chart (Click Here)