This product giving dogs around the world the opportunity to play fetch to their hearts' content. With it, your dog never be bored again. It brings you and your pets a . How to use: 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, 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. Note: Its design is let the ball launch by the turning of the inside roller,so there are some voice when using,which is as a normal situation. This product tennis launcher is an upgrade, rechargeable, can be used outdoors!,4.8cm Ball x 6 Quick Details 4.8cm(smaller than regular size tennis ball) diameter elastic tennis, suit for small age pet bite. Three-stage launch distance control, adapt to different small indoor space. Launching and fetching balls is most dog's favorite game. Mini body, not take up space, easy to place, fit in the free corner. Let you play with your love pet, even if you are busy it can help your pets keep healthy and dynamic. Can not accompany your love pet play?it is listless daily?Don't worry,now it is ! Mini tennis launcher size:280mmx280mmx235mm Color: B Green Material: ABS Plastic Package Contents: 1 * ball thrower 1 * USB data cable 6 * pet balls Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.