Thank you for viewing. This listing is for the popular OC-5. I purchased it new and used it until recently (Velcro is attached to the back). It's a very good product, but I'm selling it because I bought an xs-1 and would like someone else to use it. I've set the price at an affordable level, so please consider it. ● The New Standard in Octave Pedals The OC-5 is the definitive octave pedal, combining BOSS's traditional octave sound with the latest tracking technology. The VINTAGE mode faithfully reproduces the sound of the OC-2, a monophonic octave pedal that was a masterpiece when it was born in 1982. The POLY mode allows for stable performance over an even wider range. A +1 octave sound has also been added, supporting a wide range of 3 octaves. From fat monophonic octave sounds to chord playing with shifted ranges, the OC-5 offers the widest range, the best playability, and a refined octave sound. ・ Equipped with BOSS's latest real-time processing technology, the OC-5 is the most expressive octave pedal ever, providing outstanding sound and playability. It achieves accurate performance without latency or muddiness. It also supports polyphonic playing over a wider range than previous models. The OC-5 is a high-performance pedal that covers all the needs of an octave pedal.