![]() ![]() I have never had to clean a Logitech trackman Marble ball, but this Kensington requires constant cleaning to operate smoothly. ![]() So why the 4 stars instead of 5? You have to CONSTANTLY clean the trackball ball for a smooth operation. The scroll ring acts just like a scroll wheel on a mouse and is extremely accurate. Almost all other trackballs have no ability to scroll except to move the ball along the drawbar - and most trackballs' ball is too small to be delicate enough to just move a line at a time. ![]() The scroll ring is the high point of this trackball, since it is not a mouse, there is no scrolling wheel. The 4 triggering buttons are well placed and responsive, the whole housing is quite ergonomically designed for an extraordinarily comfortable fit - regardless if you have small hands and fingers, or large paws like me. This is a LARGE trackball, which is perfect for any operation requiring detailed operation (CAD, Painting, etc.) as well as general everyday usage. Almost a Logitech Marble Trackball.but Not Quite ![]()
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