There seem to be a few products like this, put the ball in the net and that is attached to a cord and you practice it from a belt around you, the belt by the way, used velcro to fasten and one can adjust the length of the cord that holds the ball. The exercises on then using the ball are ambitious if not exactly clear but it gives us a good idea of what to do. What they don't mention is juggling the ball but it seems to me some of the exercises are just that, they just don't call it that. Maybe they don't think they would sell as many, anyone can juggle but this allows you to foot/knee juggle in close quarters, like a room or I've even watched some games while having it tied on and practicing.