Lanzar VIBE440PSU Vibe Half DIN-In Dash 4 Band Rotary Equalizer with SD and USB MP3 Audio Reader On-Board USB/SD Input & Control - 2 Selectable Balance RCA Inputs - Optional High Level Input - Variable Input Sensitivity Front, Rear & Subwoofer RCA Outputs - 4-Band 18dB Equalizer (50Hz-210Hz-1kHz-20Khz) - Fader Control - Blue Backlight Control - Frequency Response: 10Hz-25KHz - Output Signal Voltage Up to 10V THD: 0.005% - Signal-to-Noise Ratio: 110dB Dimensions: 7"(W) x 3.625"(D) x 1.125"(H)