Thank you for looking. This is an effector made based on the Z.Vex "SUPER HARD ON" model. I am selling it because I haven't used it much. I've made various boosters, and this is my favorite among them. It's basically a clean booster, but rather than just increasing the volume, it adds a certain crispness or liveliness to the sound as the volume increases. I have added a VOLUME control to this one. When you turn up CRACKLE, distortion is added at the end, but the volume becomes too high to use. With this pedal, you can adjust the volume to a usable level in that state. It can also be used as a buffer. The parts used are carefully selected from a vast array of components through years of research. As this is a hobbyist build, there may be inconsistencies or less-than-perfect areas in the labeling, wiring, etc. If you have any questions, please ask before purchasing. Thank you for your consideration. *Shields and AC adapters are for photography purposes only and are not included.