All in all, a super mouse. I have a history with her. There was a bucket of water in the corridor, he was carrying a laptop with a mouse, he stumbled and dropped the mouse into the bucket. While freeing his hands from the laptop, the mouse spent 15 seconds in the bucket. I dried it, at first the laptop wrote that USB was not recognized and a red light was burning on the mouse inside, then it stopped working altogether. Thought it was broken, but no. 5 days later turned on - like new. The sticker on the back didn't even come off. A4Tech for this +. In general, I advise, a good mouse.