Perhaps the quietest mouse out of all the quiet mice that have passed through my hands. Good construction for its cost. Wide scroll wheel that doesn't make noise. If it remains inactive for a few minutes, it deactivates and you have to click to continue. Unfortunately, in mine, one month after purchasing it, it started scrolling incorrectly and the page would "go up and down" when I scrolled in one direction.

Update: I opened the mouse, removed the scroll wheel and cleaned it (although it didn't have anything) and when I reassembled it, the problem with the scroll wheel stopped.