Pioneer DDJ-SR 2-Channel Performance DJ Controller W/Ultrasone PRO550 Headphones The Pioneer 2-Channel Performance DJ Controller is designed to provide hands-on control of Serato DJ software. It features 2 low-latency jog wheels as well as 16 illuminated performance pads (8 per channel) that provide touch access to commonly used effects and functions such as hot cue, roll, slicer and sampler. The Pad Plus function allows you to trigger multiple effects with just one button.The controller has a 2-channel mixer with a cross fader reverse feature that allows you to switch your left and right decks. Built-in deck select buttons allow you to integrate 4 decks into the mixer for added versatility while performing. The DDJ-SR has an integrated USB sound card as well as a 1/4" microphone input for using analog sources.