Product Functions Fixed-point ball, horizontal swing ball, vertical swing ball, depth-adjustable ball, two-line ball, three-line ball, cross ball, random ball, lob ball, topspin ball, backspin ball; Custom programming, speed adjustment, frequency adjustment. Product Highlights Full-function control via smartphone APP (speed, frequency, angle, rotation, etc.) Intelligent programming for 28 landing points; customizable serving modes for training. One-key selection of 22 preset serving modes. Arbitrary selection of court landing points, suitable for training, teaching and competition. Built-in large-capacity imported lithium battery with real-time power display; continuous working time: 7–10 hours. Stepless adjustment of vertical and horizontal angles; depth-adjustable ball function available. Random ball serving function. Specifications Ball capacity: 120+ balls Serving speed: 20–100 km/h Serving frequency: 1–6 seconds per ball Power: 100W Net weight: 23 kg; Gross weight: 30 kg Standard Accessories: Remote control: 1 pc Charger: 1 pc User manual: 1 pc Warranty card: 1 pc Curved adapter plate: 1 pc Horizontal swing: ±10° (left and right) Elevation angle: 5–45°