... free parts. SS-K1-1 Elegant SeriesHigh Quality Pretty EleganceMicro-computer smart tennis ball machinel The ball speed can be fully ... control, LCD display.l 10 functions with Remote control: ball speed, feed frequency ,work/pause, fixed point/flat stroke, horizontal ... power, AC110V-240V, DC12V available.l Ball speed : 30-150 km/hr (remote control speed adjustment). Feed frequency:2-12second/ball, ...