iDogmate Big Dog Ball Launcher for Big and mid-sized dogs with 2.5" pet balls 1For large size dogs more than 30LB, if your dog play normal size tennis ball,you can choose this machine. 2 Including 3 pieces normal size food-grade rubber tennis balls. 3 distance settings , 10ft, 20ft, 30ft, 40ft with the adapter; Random distance setting alternative 4 Auto turn off feature to save the power 5Remote control, Indoor and outdoor use.