Like most of all Logitech gaming products all the buttons are relatively silent. They use micro switches and when compared to background noise they remain close to not detectable. The only button that makes any clicking noise that I can tell is the button that allows you to go from a free scroll wheel to a mechanical click scroll wheel. I assume it has something to do with the clicking mechanism in the mechanical option. Other than the mouse is fine and great for gaming. I am glad I went this version since the cord is thinner and doesn't fight you when you move, a ban of existence in previous generations of mice.