This is the Gold Class Overdrive by Anarchy Audio. I've been using it on my board, but I'm selling it now as I no longer need it. There are no issues with its operation, but please understand that this is a used item and is sold as-is, with no returns or exchanges. The following is a quote: An overdrive/booster equipped with rare N.O.S. (New Old Stock) black glass germanium transistors. It has an attractive, tube-amp-like sound, and is also excellent when paired with amp distortion. The toggle switch allows you to switch between low-power and high-power modes. In "low-power" mode, it achieves a rich mid-range and sustain like a tube amp. In "high-power" mode, it can be used as a deep mid-range booster. In addition to volume and gain, it is also equipped with a "color" control, allowing you to adjust the mid-range. As the name suggests, the gold-based design also gives it a luxurious feel. It is a pedal recommended for guitarists seeking a warm, natural overdrive sound. Thank you for looking. Type: Electric Guitar