... with Remote control: ball speed, feed frequency ,work/pause, fixed point/flat stroke, horizontal/vertical, lob,random, top spin, back ... spin.l Double power, AC110V-240V, DC12V available.l Ball speed : 30-150 km/hr (remote control ... ). Feed frequency:2-12second/ball, infinitely variable adjustment (remote control frequency adjustment).l Internal battery , Battery power warning display, ...