Ergonomic and comfortable design: The shape of the mouse fits your hand perfectly and can effectively reduce the pressure on your arm and hand. Enjoy control and precise tracking on any type of surface thanks to the trackball. Change your cursor speed and accuracy with Logitech Options software Save space: Because the trackball doesn’t need to be moved, it’s ideal for small workspaces and nestles discreetly next to your computer Dual connectivity and multi-OS: connect the trackball via Bluetooth or using the USB receiver without worrying about possible drops thanks to its 10m wireless range< /p>