A headband and two earlobe clips measure theta wave activity produced by your brain (similar to EEG monitoring technology used by medical professionals). As you relax and concentrate, the headband sends a wireless signal (based on your mental commands) to the game’s air fan, which increases or decreases its speed, suspending or lowering a foam ball; a knob enables you to turn the gameboard in order to move the ball through one of eight obstacles, including hoops, teeter-totters, baskets, or chutes.

link