Thank you for viewing. This is the TC ELECTRONIC Flashback X4. There are no issues with the operation, and all switches and knobs function correctly. The appearance is also very good, with no noticeable scratches or stains. In particular, the metal plate of the connection jacks has no rust or deterioration, and the overall condition is very clean. This unit includes reverse delay, tap tempo, TonePrint function, and a built-in looper, making it compatible with a wide range of playing styles. It's a versatile, high-quality delay pedal that can be used in live performances and studio recordings. Velcro has been attached to the back to facilitate mounting on an effects board. It has been used and stored with care, so it is in extremely good condition for a used item. This unit is rarely available in this condition, so it is highly recommended for those looking for one. Please consider this opportunity.