This USB to PS/2 Keyboard/Mouse Adapter Cable lets you connect a standard PS/2 keyboard and mouse to a single USB port on your Windows, Mac or Sun computer. The Adapter Cable has a keyboard emulation feature that lets you use key combinations on your PS/2 keyboard to mimic special Mac and Sun keyboard keys - such as volume control and CD eject - a truly convenient solution that eliminates the cost of having to upgrade a mouse/keyboard based on compatibility.