This is a Tomy's Effect Blues Breaker clone. It adds a fat mode and clipping switch to the straightforward characteristics of the Marshall Blues Breaker. This pedal can be used in a variety of ways, such as a preamp or as your main distortion. I've used it twice at home in a switcher. Operation has been confirmed. Velcro is attached to the back. Please understand that this is a used item, so no claims or returns are accepted.