This is a compact effector from BUSKER'S, a brand developed by Shimamura Music. It's a distortion pedal that offers a variety of sounds through its control knobs. - Model: DISTORTION - Control Knobs: Tone, Distortion, Level - Bottom: Velcro attached Operation has been confirmed with both AC adapter and 9V battery. Thank you for viewing. This model is already discontinued and is a used item, so please understand that it has a certain degree of wear and tear.