ART HQ231 Pro Dual 31 Band EQ, Dual Graphic Equalizer 31 Band, Feedback Detection Circuit, Output Level VU Metering on Each Channel, High and Low Pass Filters on Each Channel, Center-Detented Frequency Band Sliders, Level and Bypass Controls on Each Channel, Relay Bypass, Signal Clip Level Indicators, Variable Input Controls, Ground Lift Switch, built-in Power Supply, Dimensions: 19" 2U