This pitching machine is the perfect way for people with limited hand use to play ball with a pet or a friend, or to play lawn or target games. It has been adapted to accept a standard 3.5mm switch (sold separately). It also will work without a switch. When using a switch, the user will need to hold down their switch for about 11 seconds for the pitch to occur. Continuing to hold their switch after this first pitch will result in additional pitches about every 7 seconds until their switch is released or all the balls are used. A flashing red indicator light shows when the ball pitches, making it easy to prepare for the oncoming ball. Has three different adjustment angles. Includes 6 aero strike balls that are 2 3/4" in diamater. You should not use regulation baseballs or tee balls with this pitching machine – only use the ball type included. The ball shoot can hold up to 9 balls and additional balls can be purchased at most big box stores that sell toys. Ideally, batting friends should use a plastic baseball bat with this pitching machine.