THE AUTOMATIC BALL THROWER FOR DOGS IS NO PROBLEM TO BE PLAYED BOTH INDOORS AND OUTDOORS. IT RELEASES YOUR PET'S ENDLESS ENERGY AND KEEPS YOUR PET HAPPY BY FETCHING TENNIS BALLS ITSELF. Features : 1. Automatic ball launcher is designed specifically for small to medium sized dogs. 2. Launches the ball 10, 20 or 30 feet, which can easily be changed with the push of a button. 3. Comes with three mini tennis balls that are 2-inches in diameter. Easier for small mouths to fetch! Specification: - Color: Light green. - Material: ABS - Size: Approx. 27 x 26 x 21cmcm / 10.8 x 10.4 x 8.4 inch (L x W x H). - Power: AC adapter ( included ) or with 6 pcs C batteries ( not included ) Package Includes: 1 x Ball Launcher 3 x Balls 1 x Power cord plug 1 x User Manual How to Use： Turn on the switch at the bottom and press the (power on)for 3 seconds. Keep pressing the (power on)to choose the distance. Put the balls in the chamber which will throw a ball every 10 seconds. Push the (power on/off button) for another 3 seconds to turn off. Notes:The biggest launch distance may drop to 8m when in low battery condition. Once the ball get wet and heavier, the range will get smaller. Small balls are more suitable to small dogs. Bigger dogs may swallow the ball. Ball launcher can only work with our balls. Other balls will not match our launcher.