The Boss MS-3 is a multi-effects pedal with a switcher that expands your creative possibilities by combining a multi-effects engine and a pedal switcher in a single compact unit. The Boss MS-3 can effortlessly manage 6 internal effects at once while integrating 3 of your favorite external pedals. It also offers advanced control features, allowing you to switch amp channels, adjust effects in real time, work with MIDI devices, and more.