What you see here is a computer mouse...to be worn on your finger. Designed to allow you to operate a mouse even in the tightest of work spaces (I envision usage on an airplane) the mouse straps to your index finger, has buttons on the side you can operate with your thumb, and its sensor is optical, so you can run it along whatever surface is handy.
As someone who is inept at working the mouse that's incorporated into most laptop keyboard designs (the base of my hand always hits the sensor accidentally and sends my cursor who-knows-where) I can see this being a real boon for folks who want to be able to use an external mouse in a laptop-sized space.
Computer Shopping Supply offers the Microminature mouse for 4,980 yen, or roughly £24.00 ($44.00 American).
More Clever Mice: Optical Air Mouse | Double-Sided Mouse | Silent Mouse
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