Rockville REQ20 19" Rack Mount Pro Dual 10 Band Graphic Equalizer EQ w/VU Meters REQ20: Dual 10 Band Graphic Equalizer. Dual 10 Band Graphic Equalizer (20 Bands Total). Frequency Response: 20Hz - 20KHz. Dual VU Meters Level Monitor. Blue LED on each Equalizer Slide Control. Stereo RCA Line Input. Stereo RCA Line Output. Stereo RCA Line Output for Record. Vacuum Fluorescent Display. Bass/Midrange/High EQ Controls. Separate Left/Right Channel Volume gain control. Signal to Noise Ratio: &gt;88dB. Input Power: AC ~ 110V 60H/220V 50Hz. 110/220V Switchable. Front Panel Power Switch. Removable Rack Mount Brackets. Dimensions: 17&quot;(19&quot; w/brackets) x 9&quot; x 2.2&quot;. Weight: 5 lbs.