KidTRAC is a large, sturdy and affordable, a full-sized, low profile, three button trackball. Just plug the Clearly Superior Technologies/Microspeed KidTRAC into your computer and you are ready to go. The low profile case acts as a hand rest and minimizes the wrist angle by mirroring the natural contour of the hand. Great ‘drag lock’ feature – simply press the drag button and the button stays ‘locked’ until you press a second time. Microspeed KidTRAC is suitable for USB and PS2.