I purchased this new about four years ago. I used it for about 2-3 years to boost the volume and as a clean booster, but I switched to digital and haven't used it since, so I'm selling it. The bottom right screw is missing, but it doesn't wobble and functions normally. The XOTIC EP-BOOSTER is a booster effects pedal that enhances the sound quality of a guitar. - Model Name: EP-BOOSTER - Brand Name: XOTIC - Color: Black - Function: Booster - Connection Terminals: Input/Output Terminals Thank you for looking.