An early
combimouse prototype has been tested for usability by Wichita State University. Click here to view the
report. Issues identified in the study have been resolved.
The left unit is stationary and provides the function of the left hand side of a conventional QWERTY keyboard.
The right unit has a similar mass and centre of gravity to a conventional mouse. It also has a similar grip. Depending on the support surface it can have any desired mobility.
http://www.combimouse.com/How%20works.htm
http://www.combimouse.com/index.htm