This is a vintage, New Old Stock (NOS) Logitech Marble Mouse Corded Trackball. This unit is brand new and appears to be completely unused. The mouse is off white with a red ball and remains factory sealed in its internal plastic wrap inside the original box. It appears to have never been deployed, handled, or plugged into a computer, ensuring the tracking bearings and optical sensors are in pristine condition. PLEASE NOTE: The outer box has been opened. The original paper instruction manual and setup CD are NOT included. Everything else-including the brand-new mouse in its protective plastic wrap is present. Because this is a classic USB/PS/2 plug and play device, modern Windows and Mac operating systems will automatically recognize the hardware and install the necessary drivers without needing the legacy software disc. Perfect for collectors or trackball enthusiasts looking for a fresh, zero-wear backup of this legendary ergonomic mouse!