Utilizing the latest and most advanced optical tracking technology, the Z38 Series Optical Trackerball™ provides both conventional X and Y-axis cursor movement with an additional Z-axis control wheel surrounding the ball. The optical tracking engine provides accurate cursor motion at all speeds and on virtually any ball, combining the benefits of solid state sensing (no moving parts except the ball) with the aesthetics, functionality and performance associated with the Cursor Controls product range. The unit has been designed to be back of panel mounted as part of OEM keyboards and consoles.