Thank you for viewing. This is the TC ELECTRONIC Flashback X4. There are no issues with the operation, and each switch and knob functions correctly. The appearance is also very good, with no noticeable scratches or stains. In particular, the metal plate of the connection jack has no rust or deterioration, and the overall condition is very clean. This unit includes reverse delay, tap tempo, TonePrint function, and a 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. Magic tape has been applied to the back to facilitate attachment to 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 in a condition that is rarely available, so it is highly recommended for those looking for one. Please consider this opportunity.