Logitech’s most advanced trackball for trackball enthusiasts and users who want an alternative to mouse and trackpad. Loads the muscles 20% less compared to a normal mouse. The MX ERGO has a special adjustable hinge that can be customized to your needs, and the latest technology for recording, scrolling and power management. With Logitech FLOW you get great control across computers.selling PointsCustomized comfortFinally, a trackball you can call your own. With a special adjustable hinge, you can choose the best angle between 0 and 20 degrees for a more natural and comfortable experienceAdvanced registration and precision buttonYou can change the speed and precision of the mouse cursor with a single touch for optimal controlACCURATE SCROLL WHEEL WITH VIPER FUNCTIONWith quick access to shortcuts, you can do the job faster. The precision scroll wheel has horizontal scrolling and middle button functionsEasy workflow across multiple computersYou can connect and work on two devices at once and easily switch between them. Make it easier to work across computers using Logitech FLOW technology. Copy and paste text, images and files across computersFast rechargeable battery with long lifeThe battery lasts up to 4 months on a single full charge. One minute charging provides power for a full day’s use