I purchased this item used and have only used it at home. There are no noticeable scratches or stains. I have confirmed that it works without any problems. Full-Range Overdrive The Crayon is a versatile overdrive with a wide frequency range, featuring independent bass and treble controls. It stands out from many overdrive pedals that are characterized by their mid-range frequencies, achieving a wide range of sound creation. From a crunchy sound with a rough grain to a distortion sound, it can be used on its own or as a booster. Specs Rich, warm, and full-range overdrive Independent bass and treble controls True bypass to prevent signal degradation Compact design Thank you for looking.