Mx Ergo is a new standard of comfort and precision. Logitech most advanced trackball for trackball enthusiasts and consumers searching for alternatives to mice and touchpads. Delivers less 20% muscular strain compared to a regular mouse. Mx Ergo features a unique adjustable hinge for personalized comfort and the latest tracking, scrolling and power management technology. Logitech Flow enables effortless multi-computer control. System Requirements: Required: Available USB portWindows 10 or later Windows 8 Windows 7macOS X 10.12 or later|Required: Bluetooth Windows 8 or latermacOSX 10.12 or later