Rullemus for høyre- og venstrehendte. Forebygger slitasjeplager.
Amazon.com: Contour Design RollerMouse Red Wireless - Wireless Ergonomic Mouse for Laptop and Desktop Computer Use - 2.4 GHz Ambidextrous Computer Mouse - Mac & PC Compatible : Everything Else
Contour RollerMouse Red Wireless: trådløs ergonomisk rullemus