7 equalization bands adjustable from -12 to +12dB. Subwoofer frequency adjustable between 30Hz and 120Hz. Powered by 12 volts with 6-channel front, rear, and subwoofer aux stereo output to enhance in-car sound experience, delivering a strong and clear signal to amplifier and speakers. Supports CD and Aux (2 channel) input with gain knob for aux volume adjustment. CD and AUX input button allows flexible switching between modes. Features subwoofer volume control, subwoofer frequency control, fader control, and individual frequency band controls. Operates on DC 12V power. Durable metal chassis with high-quality knobs for precise control. Material: Metal. Color: Black. Package includes: 1 x Car Audio Equalizer. Light and display differences may cause slight color variation between image and actual item. Measurement error allowance: +/- 1-3cm.