<strong>With this Tennis Serving Machine, you can practise playing tennis anytime, no need for someone to practise with you. The thrown line is close to actual combat, and the hand feel is no different from the field hit. You can do forehand exercise, backhand exercise, volley practice.</strong><br> <br> <strong>Specifications:</strong><br> Battery(Type D battery(LR20/AM1) ) Or Plug In(110V/220V)<br> Material: Plastic<br> Total Weight: 2.18kg<br> Capacity: 30 Tennis Balls<br> Frequency: One Ball/4 Seconds<br> Throw Distance: 4 Kinds<br> Size(Except The Multitracks): 25*33*44cm<br> <br> <strong>Features:</strong><br> Lightweight<br> Convenient to use<br> Multiple power supply methods<br> Wide application<br> No training venue limitations<br> Actual combat feeling<br> Enough ball capacity<br> <br> <strong>Package List:</strong><br> 1* Tennis Serving Machine<br> 5* Tracks