4D USB Mini Optical Hand Held Portable Trackball Mouse For Laptop PC

Works great for notebook pcs. Only problem is there is not enough room for my big fingers. Other than that it's great.

Not a bad design as far as the drawing board goes but the trackball fits too loosely in practice to be controllable independent of your hand posture, if you're not holding it with the ball on top then you need to press down on it all the time to be...