I fell for the company and the price. Gaming mouse for 1000. with a resolution of 6500 dpi, a set of weights, lighting and all sorts of "fake whistles". As a result, I had 2 such mice, and here's why . The first one worked for a little more than six months, but one fine day the cursor stopped moving, and the high-frequency squeak became intermittent (at about a second interval). I believe that for some reason the sensor died. Unfortunately the warranty is over and I can't return it. I decided to buy another one, thinking that this time everything would be fine . The second mouse died a week later with the same symptoms and I handed it back to the store. I spat on this Zalman and bought a Logitech G500s for 2022r. Damn happy, but that's another story. Zalman's coolers and cases are very good, but the mice are clearly not theirs.