BIGBIG WON BLITZ2 controller carbon fiber edition. I used it for about 30 minutes to check its functionality. There are no scratches or stains. I am selling it because it didn't fit my hand. Also, the firmware of the main unit has been updated to the latest version. I measured it with a dead zone of 0, and I believe it's a good unit as there is no drift. Functionality has been confirmed. I cleaned it as much as possible, but it is a used item, so please understand before purchasing.