The GT-1000CORE shrinks down the power of Boss' flagship multi-effect, the GT-1000, into a small, portable, but no less powerful stompbox. It features 24 simultaneous effects blocks and over 140 unique amps and effects types to play around with, including classic Boss effects, MDP effects, and more from Boss' modern pedals. It has 16 slots for onboard user IRs, and a bunch of useful extra features like a high-resolution tuner with mono and polyphonic displays, a built-in looper, and two send/return loops for external effects.