It reads the electrical impulses of the brain, similar to an EEG. Then it relays a signal to the air console, which will float the ball. It's kind of cool and it's being marketed as a concentration-training toy. Whether or not it actually improves concentration is up for debate for both professionals and people with a casual interest. The application of it even as a toy is still pretty limited, at any rate.
But, hey, it -is- cool.
at 1:47 AM on Dec. 26, 2009