XScroll The High-Precision Optical Wheel Mouse Heres 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. Key features: Enhanced precision with optical engine,eliminates moving parts and dust accumulation. Comfortable fit for either hand and for long-term use.