Contour Roller Mouse Red Plus 8020 M185 is designed to be

M185 is designed to be equally comfortable for both left- and right-handed users

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Reduce Potential for Anticipation of the Click & Eliminates Finger Extension:

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Contour Roller Mouse Red Plus 8020 M185 is designed to beRollerMouse Red Plus offers superior benefits, with greater palm support and a longer, smoother transition to the RollerMouse and keyboard. Its larger size encourages better posture and improved comfort for those with larger hands and longer fingers. *Video displays the wireless version please note this product is wired. The Contour RollerMouse is a centrally positioned pointing device designed to keep cursor control directly in front of the keyboard,