Evoluent Mouse C - Improved arm and wrist posture due to a more acute elbow and wrist angle - Modern design - Fits better in the palm - Longer buttons for a better grip - Integrated solution for the adjustment of cursor sensitivity - Precision: Evoluent C works quickly and precisely - Selectable speeds (500, 1000, 1500, 2000 dpi) Operating system 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.