It's junk. The tone changes. There is only one rubber foot. I don't have a conversion connector, so I haven't tested its operation from the power supply. Operation has been tested with batteries. The item is old and in poor condition, so please consider it junk. It is junk. Please do not purchase if you do not understand. No claims, no returns, please. Used Jim Dunlop Cry Baby GCB-95 Wah Pedal. - Model: GCB-95 - Brand: Cry Baby - Type: Wah Pedal - Condition: Used - Features: Made by Jim Dunlop Thank you for looking.