The ERGO NAV is the end result of Dr. Steve Jones efforts to eliminate the need to reach to the desk for the mouse. The secret of the ERGO NAV is that it places the mouse close to the operator. Eliminating the postural stress that accompanies reaching to the desk for your mouse helps reduce many of the stresses associated with using the computer. Years of testing and countless prototypes were involved in the development of this product. We truly believe that the ERGO NAV will make a world of difference for most computer operators.