The Gear Ring from Kinekt has functional gears in the middle that allow the bezel to rotate. And that's pretty much it. No lasers or anything. They're available in US sizes 9-12 for $165, and may need to be oiled from time to time. Not unlike the Tin Man! Who, fun fact: is not a robot. Don't get me wrong, I'd still crush his ass on my face like an empty beer can, he just isn't a robot. No laughing, Lion, you're next.
Hit the jump for a video of the ring in action (with bonus sausage pinky at 0:17!).
kinekt gear ring: the only ring a geek would ever want [technabob]
Thanks to Kris, who, along with Kross, is gonna make you jump, jump! Uh-huh, uh-huh.