The Contour X-Bar is centrally positioned in front of the keyboard, allowing computer users to work in a more comfortable neutral posture and significantly reducing reaching and stretching. The unique roller bar controls cursor movements and can be operated by both hands in a centered position, providing more variety in daily computer work. The X-Bar can reduce pain and strain caused by a traditional computer mouse in the hands, wrists, elbows, and shoulders. The integrated copy/paste keys make it easy to quickly transfer text or images between programs. If you have other frequently used keyboard shortcuts, the keys can be configured and personalized as needed.