-------------------------------------------------- Shin’s Music Perfect Volume Original This is the Perfect Volume Original from Shin's Music, a high-impedance model. It minimizes sound clouding, muddiness, and distortion to the extreme, making it a top-of-the-line volume pedal that overturns the concept of "Volume Pedal = source of sound degradation." It excels in all situations, regardless of instrument or genre, such as electric guitar, acoustic guitar, and bass. No issues, operation confirmed. Includes original box, etc. This is a serial number in the 600s, an early model. I have kept it as a collector's item, but I am offering it for sale to someone who needs it. If you purchase it with other items, I will offer a discount to save on shipping and handling. Thank you. --------------------------------------------------