Genius XScroll Mouse - Optical - Cable - 3 Button(s) - Black - USB, PS/2 - 800 dpi - Scroll Wheel - Symmetrical. Here"s the latest optical mouse from Genius the XScroll, which is easy to use in either hand and easy to install. XScroll says Genius quality, but at a value price. And an all black design will fit elegantly with your PC. With no mouse ball to get dirty, XScroll makes your life easier no mouse pad required and no cleaning necessary. Even if you use it for a long time, you will still feel comfortable with the XScroll. Contact your sales representative for more information.