Table Tennis Robot with Net Automatic Table Tennis Machine Ball Launcher with Remote Control for Training 40mm Balls US Plug Item Type: Table Tennis Robot with Net Material: ABS Weight: Approx. 8650.00g/305.12oz Product Size: Approx. 80.5x33x29cm/31.69x12.99x11.42in Frequency: 50Hz, 60Hz Remote Control Battery: AA battery x2 (batteries not included) Features: Can shoot 9 types of spin balls and 1 non spin ball Adjustable angle for ball launching Random adjustment of left and right angle Automatic ball retrieval Ball spin: non spin, top spin, back spin, left or right spin, full spin Ball frequency: 30 to 90/min Ball speed: 4 to 40m/s Ball landing point: fixed or random Operating way: 2.4G wireless remote control Color: Black Malfunction, Causes, and Solutions: 1. Power on but no response: Power failure (replace power supply), cables not plugged in properly (replug cables) 2. Not shooting balls: No balls in the recycling slot (push the tennis ball towards the middle to shoot it out), damaged or dirty ball, non standard ball (replace with standard 40mm/40+ new ball), damaged supply and demand motor (replace), damaged supply and demand gearbox or gear (replace) 3. Weak shot: Topspin/backspin values ​​are too low (increase topspin/backspin values), damaged shooting motor (replace), poor socket contacting (replug), disconnected wires of shooting motor (replug) 4. Not swinging: Swing frequency on remote control not enabled (increase swing frequency values), damaged swinging motor (replace), damaged gearbox gears of swing (replace), poor socket contacting (replug), disconnected wires of swinging motor (replug) 5. Controller malfunctions: Low battery level (replace or recharge batteries)