![]() In my case, it is not enough to change the mouse settings of a 800 dpi mouse, e.g. I prefer mice of 1000 dpi, at least, and with 1200 to 1600 dpi I feel most comfortable. As a comparison I can say that a 800 dpi mouse is not enough for me. (+) It has sufficiently good optical resolution. This way the rest and the ball can not be unintentionally separated by normal hand movements. It is also thoughtfully made, as the wrist rest has a small connecting rib, which nicely fits into a groove on the underside of the trackball (see close up on my picture 4). I am personally not using it, but I find it a useful option. (+) It has a detachable wrist rest, made of something like stiff rubber. It manifests like a regular mouse to the computer and to its user. #Kensington trackballworks mojave drivers#(+) It does not require any drivers for GNU/Linux or Windows OS. (+) It is a USB wired device, meaning there are no batteries. If I have to quantify, I would say the total performance loss is under 1%. Of course, my left-hand pointing device performance is not as high as when I am using a mouse with my right hand, but as the typical interaction with computers includes a lot of other activities, like thinking and typing, my overall performance does not really degrade. I am right handed, but it took me just about a week to learn to operate this trackball with my left hand. (+) It is a finger-operated symmetrical (ambidextrous) trackball. And this trackball helped me a lot, since I learned to use it with my left hand and that brought great relief to my right arm. I often experience pain in my right arm, working long time with computer mouse and keyboard, so I wanted to experiment with something different than the usual computer mice. This Kensington trackball is finger-operated and symmetrical (ambidextrous), which turned out to be very important advantage in my case. There are generally two big categories of trackballs: thumb-operated and finger-operated. I bought this Kensington Orbit Mouse trackball with scroll ring in 2015 for about GBP25. ![]()
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