Specification: Model no. Zst-ms004 Function: High keen 800DPI design, the linearity is extremely good Hoop reel technology Supports Windows/95/98/200/NT/XP PS/2, USB, U+P, Three kind of connections Our company supply many kinds of mouse in high quality and good price, welcome the buyer all over the world to stock the product. You can find more information and specification about the product in the website of the company.