1.Automatic badminton trainer: this badminton serve has functions such as fixed point impact, automatic ball throwing and easy installation. Holds 15 badminton balls. Playfully promotes children's observation, imagination, judgment and patience. 2.2 ways to use: this ball distributor can be used indoors or outdoors. If you use the ball dispenser indoors, you can power it with a charger. To use the ball dispenser outside, you can use 4 1.5V D cell batteries (prepare). 3.ACCURATE AND EFFICIENT: The badminton serve has an impact interval of about 34 seconds, a stroke distance of 67 m and a height of 3 metres. With fixed point impact, the angle position of the distributor can move and throw off automatically. 4.SUITABLE FOR ALL LEVELS: The fixed point serve of this product reduces the difficulty of learning badminton, which is especially suitable for beginners, children and amateurs. Fixed point impact, the angle position of the dispenser can be moved and falls automatically.