The Z50 Series optical Trackerball™ provides both conventional X and Y-axis cursor movement with an additional Z-axis control wheel surrounding the ball, making it an extremely high specification, contact-less device, ideal for the most demanding of cursor control applications. The optical tracking engine combines 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. It has been designed to be back of panel mounted as part of OEM keyboards and consoles.