The accompanying app never helped me set the dpi (thus accuracy) of the mouse to the level I expected when I bought it. Not to mention that it only "sees" the mouse when it is connected to the computer via a wired connection! Generally, the accuracy of this particular mouse proved to be the same or worse than any other common mouse. I wanted to connect it to a KVM I have (https://www.skroutz.gr/s/24234549/Aten-2-Port-USB-HDMI-Audio-Cable-KVM-Switch-with-Remote-Port-Selector.html), so I could switch between the 2 computers I use. For some reason, the wired connection to the KVM's USB refuses to work. When I connect it wirelessly, the mouse movement is so slow that even at the maximum relative setting in Windows, the movement is still minimal! Nevertheless, I tolerated it for just over 1 year of use in an office environment. In that year, without any mistreatment, one day the scroll wheel broke, and now I can't scroll up and down pages with the wheel. Truly a useless piece of junk and wasted money for me! I'm writing this review, taking it out, and going straight to recycle it. As a backup, I would prefer to keep a cheap mouse I once got from Jumbo!