One Control Sonic Blue Twanger This is a booster and overdrive pedal that emulates the sound of a blackface Fender amp. The side switch allows you to switch between RHYTHM and LEAD, adjusting the amount of distortion. Functionality confirmed. Please understand the photos and description before purchasing. I kindly request that you: - Provide an evaluation on the day the item arrives. - Communicate effectively through transaction messages. - Refrain from requesting price reductions or sending silent transaction messages after purchase. Please note that to prevent any issues, cancellations or returns are not accepted after the purchase of the product.