A new standard of comfort and precision. Logitech's most advanced trackball for trackball enthusiasts and and consumers searching for alternatives to mice and touchpads. Delivers 20% less muscular strain compared to a regular mouse. A unique adjustable hinge plus extra 10 wedge offer customized comfort - choose the best angle for you between 0, 20 and 30. Precision mode button allows to instantly switch between speed and precise tracking. Easy-SwitchTM 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. 1 Long-lasting and fast rechargeable battery: up to 4 months on a full charge and one minute of charge gives up to one full day of use.2 Connect using the included Logitech UnifyingTM receiver or via Bluetooth.

1 Requires Logitech OptionsTM software, available for download at logitech.com/options.
2 Battery life may vary based on user and computing conditions.