VEVOR Portable Tennis Ball Machine-APP Control Count-5 Out Modes-29 Out Lines-Custom 1-20 Point-Adjust 20-140 km per h-40 Pounds-Lasting 6-8 Hours-150

【DURABLE MATERIAL】- Constructed of ABS shell, durable and sturdy. Driving wheels inside the body made of premium polymer composites, designed to reduce wear and tear on tennis balls, thus prolonging their service life. 【LONG BATTERY LIFE】- Strong motor ensures steady and powerful serve. Large capacity 16AH lithium battery can provide 6-8 H operation and make sure you will get enough court time before next charge. 【APP FUNCTION】- Download our app "TenniSmash Remote" to control the machine. Serving speed, frequency and mode can be adjusted with a simple click at your phone. Five mode, including 27 kinds of ball route. Can customize 20 drop points. Also can count your ball hitting number daily, weekly, and monthly. Support Android and iOS system.(As picture show). Ready to take your tennis skill to a new level. 【LIGHTWEIGHT AND PORTABLE】- Weighs only 40 pounds, lightweight design makes putting it in or taking it out your trunk a piece of cake. With two 6in wheels and one extension-type handle, it is easy to be moved over grass and curbs to the court. 【EASY TO STORE】- Detachable hopper is large enough to hold 150balls, and designed for space saver storage. Suitable for both professionals and  beginning tennis player....