Functionality confirmed. Only the Q key doesn't light up. It hasn't been used for 2-3 months, so it has a bit of dust. I'm not good at this kind of thing and I don't want to break it, so I'd appreciate it if someone who can clean it or doesn't mind the issue would purchase it. Feel free to comment if you'd like to negotiate the price. - Model: PRO - Brand: logicool - Layout: English - Features: RGB Backlight Thank you for looking.