Dog Thrower Toys Automatic Tennis Ball Machine Launcher Dog Ball Thrower Launcher Family Outdoors Training Aids Pet Products|Dog Toys Product description? Can not accompany your love pet play?it is listless daily?Don‘t worry,now it is coming Mini tennis launcher size:21x26x27cm This product giving dogs around the world the opportunity to play fetch to their hearts' content. With it, your dog will never be bored again. It brings you and your pets a playtime. How to use Press the power switch to turn on three seconds later, the power indicator light up.After three seconds of power switch, the main machine is off. After starting up, press a few power switches respectively to select the throw distance of 3 meters /6 meters /9 meters. The ball crossing at the bottom of the host tennis ball has infrared sensor.Scanning every 10 seconds, the host can deliver the ball every 10 seconds.