Two-channel DJ mixer controls up to four decks with Virtual DJ software. It features balanced 1/4" outputs, unbalanced RCA inputs, hot cue buttons, and mic input.
In this video DJ tutor shows you how to set and play another file on the same side of the unit. Doing it this way will blend the next tract in with the one that's playing, so as you start the second the first will fade out over the one comming in.