The Adesso Smart Cat USB Touchpad, model GDU-410, is a touch pad designed for use by individuals with fine motor disabilities. Intended to provide cursor control using a right-or left-hand finger, this device features one-touch vertical and horizontal scroll and zoom, glide extend, and a Cirque driver. The unit has four mechanical buttons and three programmable functions. Sounds and speed, sensitivity, and orientation settings are customizable with installation of the Cirque driver. COMPATIBILITY: For use on IBM and compatible computers. SYSTEM REQUIREMENTS: Windows Vista, XP, or 2000. DIMENSIONS (LxDxW): 4 x 0.375 x 4.4 inches. The system comes with a 6-foot serial cable and a 6-inch P/S 2 adapter. WEIGHT: 0.5 pounds.