Note: Please use the balls with diameter of 40mm (1.57 inches). Please must use more than 15 balls to use this machine. If there are less than 15 balls, the ball will not come out. Specifications: ? Rated voltage: 100V-240V? Rated power: 36W? Arc adjust: 7 angle setting? Ball speed: 4-40M/S? Ball out frequency: 40-70/ minutes(The frequency of the ball will be adjusted from left to right from left to right)? Spin direction: 2 wheels drive (multi-spin, up and down, right and left)? Dropping: Fixed dropping? Swing frequency: 0-5 level swing speed adjust? Out-ball frequency: 0-5 level can be adjusted? Ball switch: Short ball/long ball switch? Load ball: More than 100pcs? Package size: 41*36*32CM Features: 1) Twist the ball button to make the ball suitable for you. 2) Fill the serving machine set ball container with table tennis and hold approximately 110 ping-pong balls. 3) Twist the frequency button, the modulation is best for the service frequency. 4) Adjust the position of the machine according to your own preferences. Package Include: 1 x Table Tennis Robots Spin the ball control: 1. Top rotation - the modulation is over 2, and the downward spin is 1. The balls will rotate upward. 2. Downward spiral --- modulation is 1, lower rotation is more than 2. The balls will be sent downward. 3. No rotation - the same number will be rotated in the modulation, and the ball sent out will not rotate. More points to the ball.The swing frequency is moderated from left to right.