Inputes 4 independent 2 x 2 single on the same track.
a master out L & R, monitor out, send eff - eff rtn. multiple effects built.
Simple configuration, no manual, usual easy access functions.
relatively effective equalizer, a little breath because of age.
I use it for more than twenty years, I have not owned a different model, I will do more comparisons with more choices today, compact easy to set up, not too heavy, good quality / price ratio, they have never failed two or three fuses changed in twenty years.