S4015C is the newest SMART tennis machine model of SIBOASI, it can be used by APP control, and unique programming functions, with the most competitive price, many clients like it very much, and it is also very popular in the Europe countries.

​Tennis is one of ball sports. The effective tennis court is a rectangle with a length of 23.77 meters, a singles court with a width of 8.23 meters, and a doubles court with a width of 10.97 meters. There is a net in the middle of the game, and both sides of the game occupy one side of the court.