Design for Fun: The All For Paws Interactive Ball Launcher is an automatic fetch machine that can be used by the dog, owner, or just the dog. Launcher features make indie play easy and fun. All you have to do is plug it in, choose your launch distance and drop it into a 2 inch mini ball. Adjustable Launch Distance: The ball launcher can launch the ball from 10, 20 or 30 feet, which can easily be changed with the press of a button. Fetch Balls Includes: This ball throwing toy comes with three sturdy tennis balls for endless fun. Requires 6 C batteries or an AC adapter. TIPS FOR USE: Always supervise your dog while he is playing. Some toys may be inappropriate for your dog. Remove and replace toy if damaged.