In order to use the MLM2PRO indoors you will need at minimum a space that is 14.5 feet long, 10 feet wide and just under 9 feet tall. Please remember that the distance the ball needs to travel is at least 8 feet, and the MLM2PRO should be 6.5 feet directly behind the ball.In addition to the space requirements the following accessories are required:- Tablet or iPad as main software controller- Hitting screen, enclosure or net- Hitting mat- Optional items: projector, connection cables, tablet/iPad stand