Master professional training with one machine in place. This APP controls the electric tennis serve machine, which can accurately set the ball speed, rotation, frequency, and landing point changes through a mobile phone, perfectly simulating various practical ball paths such as topspin, cutting, and flat hitting. Integrated design, easy to move, universal for indoor and outdoor use. Whether it's single person targeted improvement or assisted multi person training, we can provide highly customized, stable, and efficient training plans to help you advance scientifically.