Thank you for viewing. This TS9DX was obtained as a non-working item, but I repaired it by adding jumpers to fix a broken circuit board pattern around the DC input. As shown in the images, various parts have been replaced, and the op-amp has been socketed with an 8820 installed. It seems like various attempts were made to improve the sound quality. The exterior has been cleanly stripped of its paint, giving it a bare aluminum look, almost like a handmade effects pedal. The knobs have been replaced with metal types. The battery snap has been removed, and I also primarily use an AC adapter, so it is not attached. Currently, it produces the TS9 sound, and mode selection is also working. I believe it functions properly as a TS9DX. Fortunately, there seems to be no crackling. This product is being sold as a junk item. Please understand and accept the no-claims, no-returns policy before considering a purchase. This product is intended for electronic hobbyists who are able to work on the internal components of effects pedals to some extent. Instant purchase is OK. I will ship it on the same day of purchase if possible, or at the latest, the next day. Thank you.