Perixx PERIBOARD-518H US, Wired USB Keyboard with Trackball - 14.88"x7.76"x1.18" Dimension - Built-in Numeric Keypad - Silent X Type Keys 14.88"x7.76"x1.18" (378x197x30mm) Size Build-in laser sensor technology with control of mouse function Large 0.75" (19mm) Trackball fit with Various Industrial Application Built-in Numeric Keypad and 2x USB2.0 Hubs - Silent X Type Scissor Keys 5.90 feet (1.8 meter) Cable