This is a Logitech G703 gaming mouse. The scroll wheel isn't working well (the scrolling accuracy is poor), and after searching online, I found that this is a common issue with the G703. It seems like it could be fixed by repairing the wheel (replacing the rotary encoder, which costs about 50 yen), but I don't have a soldering iron, so I'm putting it up for sale. Would anyone who can fix it be interested?