Ione Scorpius K3N Mini Mutimedia Trackball Keyboard Slim design. 18 multimedia control hotkeys. Three ACPI hotkeys. Includes a 19mm trackball and three standard mouse buttons for the pointing device. Removable wrist pad. Quiet soft touch keys with membrane design. USB interface. This keyboard gives you the space saving and its comfort touch and one touch multimedia function makes it an advance super slim multimedia keyboard. System requirements: IBM or compatible PC Windows 98/2000/ME/XP No driver needed under Windows 2000/ME/XP Measurements: Keyboard: 12.5"(L) x 6"(w) x 1"(H) inch