The Adesso Wireless Mini Trackball Keyboard provides optimum control of your computer at a distance of up to 30 feet away. The integrated trackball and mouse buttons provide you with all the features of a mouse, but without the need of an additional accessory. The trackball delivers superior precision and smooth motion with no maintenance or cleaning required. This keyboard is perfect for compact spaces like small office cubicles, home offices and kiosks. This unique keyboard also works great with PC systems, LCD monitors and Tablet PCs in both your home and office. The keyboard is compact and is also extremely mobile, fitting easily in a briefcase or backpack. Windows 7, Vista, XP or 2000