Thank you for viewing. I purchased this item but stored it without using it much. I threw away the original box, but it has only been used a few times, so there are no stains, and it is in excellent condition with only one hairline scratch on the % knob. Of course, the function and performance were working without any problems. The included item is the instruction manual. To prevent product substitution and return troubles, we will not accept cancellations or returns after the item has been shipped. Please check the condition of the item in the images before purchasing. If you accidentally purchased the item or wish to cancel after purchase, please let us know before shipping. I will always reply to comments, but please understand that there may be some delay due to work.