This is a Brush Eight MOD for the Sonic Distortion SD9. The version is unknown as I don't have any documentation. It has a sound that seems to brush up the rough and powerful distortion of the Sonic Distortion. It gives the impression that the mid-low range push has also increased. I am selling it to organize my equipment. It is in beautiful condition with no noticeable damage, and it works perfectly. Comes with the box. Thank you.