I purchased this six months ago, but I only used it as an amplifier for about three days. Since then, I've occasionally used it for Bluetooth. There are no noticeable scratches or stains. This is an amplifier specifically for acoustic guitars. I have confirmed that it is working properly, and there are no connection issues. It comes with a case. [Included Items] ・THR30IIA Wireless ・Power adapter ・Charging cable ・Dedicated case (portable) Although there are no scratches or stains, please understand that this item has been in someone's possession before you purchase it. To prevent any issues, returns are not accepted. I will respond to any inquiries in the comments section.