The M.BOX01 is a part of the Korg PG Mini line of portable synthesizers. It is a small, lightweight, and durable analog synth module that is designed to be used with other modules like the Korg MS-20 mini, Volca Bass and fm, or any number of other compatible Korg synthesizers. It can be used to expand the sound capabilities of these instruments, adding new layers and textures to tracks. It has a unique 16-step sequencer and 15 different effects, including Delay, Reverb, Distortion, and Flanger. Additionally, the M.BOX01 can be controlled by MIDI, allowing for easy integration into any production setup.