The Kensington Expert Mouse Pro Trackball Model # 64213 is a USB wired trackball mouse that can be connected to a computer via USB or via PS/2 with adapter that is not included. It has 6 programable buttons on the top and the other 4 buttons are also programable. The unit is compatible with both PC and Mac computers. The product is in great shape, very clean and shows only slight wear on the left lower button that gets used often. It is silver in color with a bright shiny blue trackball that is removable and cleanable. This trackball required the software to work efficiently. If you don't have the software installed, it moves very slowly. I believe this software is available, but I can't guarantee it.
Personal Note: If you are experiencing any wrist issues and you are using a standard mouse, then you need a Kensington trackball to save your wrist from having Carpal Tunnel issues and then requiring an ugly surgery. I have personally used Kensington Trackballs for over 20 years, and I have never had wrist issues and many of my co-workers have required surgery.
- Kensington Expert Mouse Trackball (USB)- Requires Mouseworks software to program buttons - (Go to Kensington.com and get current software)Seller Note: I always ship my sale items the day after payment is received.