Yeah the button below the scrollerwheel is a DPI setting. I had a cougar mouse and like less than a year later the scroller wheel craps out. PC Case Gear sent out a new one (they couldn’t fix it), new one works fine but a few months ago it’s crapped out again, scroller wheel again. So I bought a Logitech one. Only had it for maybe two or three months, but so far works pretty good. I don’t have any major complaints about Logitech, they’ve really stepped up their game recently.