The BakkerElkhuizen Evoluent 4 ergonomic vertical mouse promotes a healthy and relaxed handshake position to prevent pain and discomfort in the wrist and shoulder. It keeps your wrist from bending for less muscle activity in the forearm. Other highlights: - Minimal learning curve - Fast and accurate cursor control - 4 x Selectable speeds Configuration: Right-handed A mouse pad is recommended when using a vertical mouse. System requirements: Windows 7, 8, 10, OS X 10.5 < BakkerElkhuizen guarantees the longevity of its products. Register your product before the basic warranty expires on the manufacturer's website using the registration code or the EAN number on your product for an extended warranty of up to 5 years on electronics or even longer warranties on non-electronic products! * Extended warranties apply to all non-electronic products with the exception of all gas spring parts, which are covered by a 5-year manufacturer warranty.