Automatic Ball Launcher for Dogs: This automatic dog ball launcher is designed for medium to large dogs. The dog ball thrower launcher automatically launches 2.5inch dog balls and throws them over a long distance, stimulating the dog's nature of chasing and jumping. Meeting their needs for active play helps keep them physically healthy and mentally active. 3 Adjustable Launch Distances: This dog ball launcher offers three different launch distances 40 feet, 60 feet, and 80 feet. You can easily select your desired distance to accommodate different play areas and your dog's energy level. Whether it's a small backyard or a large park, this tennis ball launcher for dogs will keep your dog active and happy.