I've had the mouse for over 3 years and it's been working, but it's a bit dirty and I cleaned it. The reason for selling is that it used to suddenly freeze occasionally, but I tested it a while ago and it was acceptable. The RGB lighting is broken, but it's not an issue. The button mentioned in the text sets the DPI speed level for each color. Price: 50, negotiable. Anyone interested can contact me on WhatsApp, I'm at the authority.