The patented shape of the Evoluent VerticalMouse 4 Small supports your hand in an upright neutral posture that generally avoids forearm twisting.

Comfortable and easy to use - The shape is thoughtfully sculpted for uncompromising comfort and easy-to-reach programmable buttons. No finger contortions are needed to operate the buttons.

Improved thumb rest - The thumb rest has been reshaped to provide even more comfort over earlier versions.

Now two thumb buttons - A new bottom thumb button provides greatly extended functionality when used with the included driver.

Extended lip prevents rubbing - An extra wide lip along the bottom edge prevents the last finger from rubbing the desk.

Adjustable optical sensor - Pointer speed controls on the side allow convenient adjustment without even releasing your grip from the mouse - Top mounted LEDs show through the chrome thumb rest to indicate selected pointer speed including extra low (XL), low (LO), MD (medium), to high (HI.

Pointer speed indicators - The logo is pure eye candy. The illumination turns off when the system is in sleep mode to conserve notebook battery power.

Lighted Evoluent logo - Evoluent Mouse Manager for Windows provides extensive but easy to use functionality for 6 buttons through a simple and intuitive interface.

Compatibility:

Windows: Downloadable driver for Windows XP, Vista and Win 7 in 32/64 bit for programming all 6 buttons. The driver is not required. The VerticalMouse 4 still has basic functionality without it

Mac: Downloadable driver for programming 6 buttons. The driver is not required. VerticalMouse 4 still has basic functionality if the driver is not installed

Linux: Basic functionality without a driver