I purchased this approximately two months ago and used it about 5 or 6 times. I haven't used it for a while since then, and its operation is currently unconfirmed. I have applied cellophane tape to the voltage display to prevent scratches. The appearance is clean, with no noticeable scratches or stains. Since it has been used only a few times, I think it can still be used for a long time. *Please purchase only if you understand that this is a used item and its operation is unconfirmed. *Instant purchase is welcome. I will carefully pack and ship the item.