Lobster Sports &ndash; Elite Liberty Tennis Ball Machine &ndash; Smaller Battery Operated &ndash; Lightweight &ndash; Full-Featured Tennis Ball Hopper &ndash; Random Oscillation &ndash; Battery Charger Included &ndash; Optional Accessories ENHANCED FEATURES AT AN AFFORDABLE PRICE: Lobster Sports has designed the elite liberty tennis ball machine to challenge beginner level players. It is a uniquely designed, easy-to-use product equipped with enhanced features at an affordable price. SPIN-CONTROL FEATURE INCLUDED: The elite liberty ball machine also offers unequalled spin control for a machine at this price point. The ball spin can be adjusted for both topspin and backspin and at different levels. LIGHTWEIGHT AND DURABLE: Designed for maximum durability, this tennis ball machine has been manufactured to hold up against constant use. The 35-pound ergonomic design makes it lightweight. EASY TO TRANSPORT: The elite liberty tennis ball machine is easy to transport in your car. Its oversized wheels and 3-foot ergonomic folding handle allow for easy transportation over grass, gravel, and curbs. VERSATILE TENNIS BALL MACHINE: This tennis ball machine offers manual oscillation, ball speed from 20 to 70 mph, an elevation from 0 to 50 degrees, while its small, lightweight battery is easy to transport, and can operate from two to four hours.