Pyle PPEQ231 2-Channel 31-Band Graphic Equalizer Constant Q Circuitry with a 3% Center Frequency Accuracy - Selectable Boost Range +/-6 dB or +/-12dB - High Pass Filter 40 Hz (12dB per Octave) Low Pass Filter 16kHz (12dB per Octave) - Variable Input Level - Clip LED Indicator Bypass Switch - Automatic Bypass When Powered Off - Active Balanced XLR and TRS Ins and Outs Unbalanced RCA Inputs and Outputs - Ground/Lift Switch - Double Rack Space Unit 110/220 Voltage Switchable - Dimensions: 19'' x 8.66'' x 3.5''