Logitech MX ERGO MX ERGO Advanced Wireless Trackball for PC and Mac A new standard of comfort and precision. Logitech s most advanced trackball for trackball enthusiasts and consumers searching for alternatives to mice and touchpads. Delivers 20% less muscular strain than a regular mouse. An adjustable hinge offers personalised comfort. Precision mode button allows to instantly switch between speed and precise tracking. Easy-Switch and FLOW-enabled for effortless multi-computer workflow. Pair up to 2 computers and easily switch between them. Copy and paste text, images and files. Fast-rechargeable battery lasts up to 4 months on a full charge. Connect using the included Logitech Unifying receiver or via Bluetooth.