"Small. Really small." MicroPointing's CEO Ailon Tamir, “One square millimeter.”

“The mouse in question is the one which will be replacing the "four-way rocker" used to control menus, functions, and other features of mobile phones.   There is a great deal of competition for space on a mobile device’s surface, which of course is very limited. The old-fashioned rocker-style mouse used by most devices today, which measures 35 millimeters squared, just takes up too much room."- Tamir (interview Israel21c)

Current rockers are also on the device itself, while the new mouse will be in a ring on your finger, or on a surface (if being used in a medical device to control nano-devices in the body.

picture from Micropointing

The smaller MicroPointing mouse opens a whole new world to designers: the medical and gaming industries will be very interested in this device because it eliminates the need to designate a flat space for using a mouse. MicroPointing’s device can be placed on rounded surfaces as well as very small spaces. Applications could range from tiny mouse-controlled medical devices for use inside the body to gaming devices with two micro-mice positioned to let player's thumbs more easily control the action.

It doesn’t hurt that it’s a good deal less expensive and uses far less power than the old rockers. I believe we'll be seeing tis in both medical and gaming devices in the not so far away future not only because of it's lower power drain and cost lowering, but also because it's control will be more intuitive.

There’s a video on Micropointing’s website: http://www.micropointing.com/technology.asp

Sources:

http://www.micropointing.com/default.asp

http://www.israel21c.org/201105269060/technology/click-on-micropointings-mini-mouse-to-see-the-future