The BOSS GT-1 Guitar Effects Processor is a multi-effects unit with COSM amp models and FX - derivative of the BOSS GT-100 pedal board series. The GT-1 is a more compact and affordable version. Excellent built quality,rugged and designed for touring. The GT-1 is also great in the studio, featuring direct USB out for recording and a headphone amp for rehearsing. The GT-1 is easy to navigate, with a detailed screen and edit buttons. The GT-1 also has an in-built pedal assignable to volume control, wah or expression.