It works without any problems. One knob is missing. This is the main unit only. Please consider it. The Source Audio "SA120" offers a variety of distortion patterns with simple operation. You can easily select from 21 types of distortion using the center knob. It supports the separately sold motion sensor, allowing you to control the effect with just hand movements, and offers a variety of expressions such as a multi-band mode that separates chords and multiple strings by changing the distortion for each frequency band. * Batteries will be removed before shipping. The patch cable in the photo is not included.