This is a JIM DUNLOP CRY BABY GCB-95 wah pedal. It was at home, but I haven't used it for a long time. I checked the operation and it powers on and produces sound, but I found out that it is not working properly. I will list it as a junk item. I don't know much about the technical aspects. I would appreciate it if someone who can repair it would purchase it. Please understand that this is a junk item, and refrain from purchasing if you are sensitive to this.