The controller has a 2-channel mixer and features built-in deck select buttons, which allow you to integrate 4 decks into the mixer for added versatility while performing. The unit has an integrated USB sound card as well as a 1/4" microphone input for using analog sources. The mixer will function standalone without a connected computer. The rear panel offers phono/line RCA inputs, XLR & RCA master outputs, and 1/4" booth outputs. The Pioneer DDJ-SR2 ships a power cord, AC adapter, and a USB cable.