Trackball mouse. Requires less wrist movement than traditional mice, since it tracks the motion of the built-in ball instead of the movement of the entire mouse. Ergonomic sculpted shape. Minimizes movement and maximizes comfort while keeping your hand and arm relaxed. Promotes increased comfort, lower muscle strain, and improved, more natural posture. Compatible with most Windows and Mac computers and iPad tablets. Works across a wide array of computers and tablets. Two ways to connect. Connect simply with Bluetooth Low Energy or the USB receiver, and never worry about drop-offs or lag up to a 33’ (10m) range.