This Logitech TrackMan Marble Wheel USB mouse is a great addition to your computer setup. Its ergonomic design ensures comfortable use for right-handed individuals, with a unique grip that allows for precise tracking and control. The optical tracking method provides accurate movement on any surface, and the three buttons make it easy to navigate and control your computer. This unit is in great working condition and has been tested to ensure optimal performance. It is a white-colored unit with the model number T-BB13 and part number 804335-0000. The mouse is compatible with any computer that has a USB port and is perfect for use in any home or office setting. 31