This is the Line 6 M20d digital mixer and USB audio interface.I bought this when I was singing in a wedding band but no longer use it as I'm not singing with the band at the moment. This mixer is incredible as it allows non sound-engineers to get a great mix in a fraction of the time. Click on this review to learn about all the insane features:https://www.soundonsound.com/reviews/line-6-stagescape-m20dAny questions, please ask.