Lobster Sports &ndash; Elite Three Tennis Ball Machine &ndash; Triple Oscillation &ndash; Dual and Two-Line Oscillation &ndash; Lightweight &ndash; 4- to 8-Hour Battery Life &ndash; 60-Degree Lobs &ndash; Optional Accessories &ndash; 42 Lbs. TWO-LINE OSCILLATION: The Lobster Sports elite three tennis ball machine includes a dual setting two-line oscillation feature. Its a great way to warm up and great for groups to play in school, tennis camps, family outings or a club setting. TRIPLE OSCILLATION: The Lobster Sports elite three tennis ball machine is built with unique triple oscillation. It oscillates both vertically and horizontally, the first engineering design in tennis ball machines to simulate match play. DURABLE YET LIGHTWEIGHT: Weighing only 42 pounds, the elite three is easy to load into your vehicle and unload. Lobster Sports has designed the elite three to hold up against frequent use. FOUR TO EIGHT HOURS OF BATTERY LIFE: The Lobster Sports elite three tennis ball machine is built with a long-lasting, high-capacity battery. A four- to eight-hour battery life helps ensure plenty of court time between recharges. MULTIPLE ACCESSORIES: You can purchase many accessories to enhance the elite three, including the elite remote control, two upgraded battery chargers, storage covers, an external battery pack, and external a/c power supply.