Battery Or Plug In-The Tennis Machine can be powered with 4 Type D batteries(LR20/AM1) or plugged in(220V/110V).
Hold Enough Tennis Balls-The Tennis Serving Machine with multitracks can hold 30 tennis balls. No need to pick up the balls often.
Features-The throwing distance can be adjusted in 4 levels. Different balls have different throwing distances. The frequency is one ball every 4 seconds.
Wide Application-The Tennis Machine is suitable for almost all tennis balls except one kind whose diameter is 7.5cm.
Satisfactory After-sales Service - If you are not satisfied with the product, you can ask for return. Free parts exchanged within one year. You can place an order with confidence without any risk. Please do contact us first if there is any problem with the product.