Lobster Sports Elite Freedom Portable Tennis Ball Machine (21x14x 20- Inch) Designed for maximum durability, its 35-pound ergonomic design and oversized-wheels allow for easy transport, even with a full hopper of 150 balls. A 2-4 hour battery allows you the freedom to play anywhere at anytime. The full corner-to-corner sweep of the Elite Freedom will challenge a wide range of players from advanced to beginners alike. Oscillation: Random horizontal Speed: 10 to 70 mph Ball capacity: 150 Feed rate: 2-10 seconds Power: battery Court time: 2-4 hours Elevation: manual 0-50 degrees Weight: 35 lbs. Spin: none Warranty: 2 years Includes Basic Battery Charger Optional Accessories Available: 1-Amp Fast Charger 3-Amp Premium Fast Charger Storage Cover External Battery Pack Hazmat and non-returnable