The Slinger Bag ball machine is the first portable, affordable tennis ball machine. Practice anywhere and anytime to improve your game. The Slinger Bag is extremely versatile and can be placed anywhere on the court to practice any type of shot with varying speeds, frequencies, and height differences. This multifunctional tennis bag provides storage for up to 144 tennis balls, your rackets, and all your other tennis gear. It features multiple pockets for storing valuables and even a cable for charging your mobile phone. Thanks to the wheels, the Slinger Bag is easy to move. The Slinger ball machine has a starting speed of 16 to 73 km/h. The powerful lithium-ion battery lasts up to 5 hours. An easy on-off control for both the Slinger bag and the Slinger oscillator is possible with the handy remote control. The Slinger oscillator can rotate to ensure balls reach the entire court. With the Slinger Ball Tube, you can easily and quickly collect the tennis balls.