BOSS PH-1R Phaser Phaser Effect Pedal I have confirmed operation using my own AC adapter. The LED lamp does not light up. The sound changes. There are knobs, but the retaining screws are missing, so they come off. This item is being sold as-is [junk item]. Please purchase with the above in mind. #BOSS #PH_1R I apologize, but to avoid any trouble, I do not allow holds on any items I am selling. Also, due to work commitments, it may take a little time to ship. Thank you for your understanding.