The Evoluent VerticalMouse's patented shape supports a user's hand in an upright neutral posture that generally avoids forearm twisting. The design is meant for pain relief and easy accessibility to programmable buttons. No finger contortions are needed to operate the device. Additionally, pointer speed controls on the side allow for adjustment without grip release of the mouse.
POWER: USB port.
SIZES: Small, medium or large.
DIMENSIONS: 4.45 inches length x W 3.15 inches width x 3.03 inches height.
WEIGHT: 6.7 oz .
COMPATIBLE: PC and Mac .
WARRANTY/GUARANTEE: As stated by the manufacturer.