Tennis machine

1.Speed:20-140 km/h 2.Frequency:1.8-6 sec/ball 3.Fixed point 4.Random function 5.Top and back spin adjustment 6.Deep-light ball 7.Two line function 8.Three line function 9.4 kinds of cross line function 10.Standard accessories :remote control,power cable 11.Battery Optional:3-5 hours working time 12.Ball Capacity:160pcs