Evoluent VM4S Right Handed VerticalMouse - Small, version 4,black

Avoid Forearm Twisting: The patented shape supports your hand in an upright neutral posture that generally avoids forearm twisting. Many users, including medical doctors, ergonomists and physical therapists, said the Evoluent VerticalMouse provides superior comfort and even relieved their wrist pain.

Comfortable and Easy to Use: The shape is thoughtfully sculpted for uncompromised comfort and easy-to-reach programmable buttons. No finger contortions are needed to operate the buttons. An extra wide lip along the bottom edge prevents the last finger from rubbing the desk.

Adjustable Pointer Speed With Indicators: A button behind the wheel enables quickly changing the pointer speed to suit different tasks: select higher speed (higher DPI) to make the pointer move faster for general use; select lower speed (lower DPI) to make the pointer move slower and more precisely for drawing, photo editing, etc. Up to four lights show pointer speeds from slow to fast

Improved Thumb Rest with Buttons: The thumb rest has been reshaped to provide even more comfort over earlier versions. A new bottom thumb button provides greatly extended functionality when used with the included driver.

Easy to Install, Option to Customise: For basic functionality, simply connect and play. Optional Evoluent Mouse Manager Software may be installed to configure the buttons to perform many common functions. For example, button 2 may be configured to perform a double click with a single actual click to open a program, button 3 may be configured to open a link in a new tab, button 4 may be configured to cycle through open tabs, button 5 may be configured to close a tab, etc.