Scorpius P7 - The trackball-keyboard has an enhanced slim design, which works with any IBM USB compatible computer. As there is no need for an additional mouse, this keyboard is the perfect match for home entertainment or industrial needs. Utilizing the latest in rubber mechanical key switch technology, the Scorpius P7 offers durability and style that will enhance any system for years to come. Features: Great performance in business applications with optical trackball, Standard left and right mouse button function. (Similar to Cherry G84-4400 keyboard) System requirements: IBM or compatible PC Windows 98/2000/ME/XP/Vista/ Windows 7