Kensington – SlimBlade Trackball – Graphite/Ruby Red

Trackball mouse with reliable optical tracking Trackball mice require less wrist movement than traditional mice, since they track the motion

Kensington Pro Fit Ergo Vertical Wireless Trackball – Black and Red

Ergonomist Approved Design Promotes proper wrist, arm, and shoulder alignment to maximize comfort and minimize potential strains. Easy to Use