.25 Din Size, 5 Band Graphic Pre-Amp Equalizer with Subwoofer Crossover and CD input Jack, Gold Plated RCA Line Input/Output, Low Level RCA LIne Input, RCA Subwoofer Output, Night Illumination, Fader Control, Frequency Control Range: 12dB: 50Hz/200Hz/800Hz/3.2hkHz/12.8kHz, Sub Gain: 20Hz - 20kHz.  Weight: 340g.