Compact booster effect pedal, with four knobs for sound adjustment. - Model Name: RC-Booster - Brand: Xotic Effects - Function: Booster - Number of Knobs: 4 - Number of Switches: 2 - Connections: Out, In - Size: Compact Thank you for looking. Sold as-is (3N - no claims, no returns, no refunds). I think it works fine.