19-inch, 4-Channel MIDILOG? Mixer (compatible with any ?Midi Learn? Software or Analog Inputs ? such as CD Players, Turntables, etc.)Inputs: 4 Line, 2 Phono, 3 Mics20 On-board Midi Control Buttons (Mapable)MIDI interface (USB MIDI I/O)Built-in DSP D-Core? Sound Card with 4-In/4-Out audio interfaceController Mode: When activated USB output streams are routed through master and headphone outputsBalanced XLR Outputs3-Band EQ with Rotary Kills (Treble, Mid & Bass)Midi Navigation Controls to allow easy software navigation of your music libraryCrossfader Curve AdjustmentCrossfader Channel AssignMaster, Booth, Headphone Level & Mix ControlsMicrophone Volume Control + 2-Band EQ (Treble & Bass)Microphone Reverb ControlMic 3 routed through channel MIDLOG? 4Crossfader Assignable Low/High Pass Filter Control10 segment VU meterAudio inputs: RCAMicrophone inputs: 1x Balanced XLR, 2x ¬? BalancedHeadphone input: ¬? StereoMulti-voltage operation: AC 100V~240V 50/60HzDimensions (LxWxH): 19?x7.25?x 3.5? / 482x178x85mm (19-inch R.M. 4 spaces)Weight: 8 lbs. / 3.4 kg.