The USB module enables Play, Pause, Prev, Next, Repeat, Song number is also displayed. This 3 channel DJ Mixer build with a high quality circuit design and 10" rack mount with a good balanced output, individual PFL and EQ with Low, Mid, High Cut and boost knob. It features XLR balanced outputs, individual PFL and three band equalizer. Carbon 3USB MK3 comes with multiple inputs 3 line and 3 phone input with grounding connection for turntables and 1 Microphone which is a combo jack using either a XLR connector or P38 Mono Jack. Multiple outputs like XLR Balanced and unbalanced RCA outputs with recording out and booth out for personal monitor provide immense flexibility. The superior build quality and rugged components used in these mixers serve you well for years to come. A Special feature is the VAAT Voice Activated Automatic Talkover system which automatically mutes the music and microphone takes predominance over the music. Carbon 3USB MK3 feature super-smooth channel faders and the removable rail glide crossfader for the utmost in reliability and smooth audio performance. The 8 segment stereo LED shows audio level for master and PFL. Carbon 3USB MK3 is absolute value for money do check out one at your nearest store and you would be pleasantly surprised at the value for money equation.