Product name: tennis ball machine Size: 30*13*44cm material: plastic Weight: 1.3kg Power supply: 220v/1.5V D-type battery (not included) Features: ①: The bottom can be rotated to change the hitting point ②: 3 ball frequency adjustable, respectively 4 seconds, 5 seconds, 6 seconds ③: 2 high-end positions adjustable hint: Low pressure ball and sponge ball will throw the ball higher and farther Children can use 2 gears or 1 gear to adjust the intensity