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The concept behind the device is, in its way, relatively simple. The headband has a trio of sensors across the front, and those sensors read electrical impulses in various frequency ranges, which equate to a number of different facial movements and—so it would seem, at least—patterns of thought.
Schuette mapped the most basic controls to the facial muscle inputs, but the most impressive input had to be his "jump" key, which he mapped to one of the brain wave readings and activated via what he called his "Tourette's impulse." Basically, he'd think of an expletive, and his character would jump.
One of the things that surprised me about using the headband is how, well, cerebral it is to use. I expected to be contorting my facial muscles wildly in order to use it, but in reality, it's best to relax and gently control things. On top of that, something about the experience of using it is difficult to articulate but intuitive to apprehend.
In other words: Freaky! It's a brain control thingy!