If you've ever seen someone play the theremin, you'll have an idea of how to use the FinRing. It's a matter of smoothly and carefully moving your hand in just the right way. With the FinRing, tilting your finger one way or another determines how the cursor will move.
Bosswave Enterprises has a dream. No longer will the mouse be some external device. The mouse will now be a part of you, moving in perfect harmony with your every whim. And so they offer the world the Cat Eye FinRing, a tiny cordless mouse you wear on your finger.