About this item 7 Equalization bands 63hz 125hz 315hz 750hz 22khz 6khz and 12khz could be adjustable from 12 to 12db The Subwoofer frequency is in 30Hz to 120Hz adjustment WARM TIP If you encounter any problems after receiving the item please contact us immediately we will try our best to solve the problem for you Powered at 12 Volts with 6channel Front Rear and Subwoofer aux stereo output which enhances your sound experience in the car That makes sure that your amplifier and speaker receive a powerful but clear signal Allowed CD and Aux 2 channel input with gain knob to adjust aux volume also a CD AUX input button could switch flexibly to another mode input Flexible control as your favor subwoofer volume control subwoofer frequency control fader control each various Hz control This car equalizer is supplied by DC 12V power Besides strong metal chassis with high quality rotary knobs for all controls to enhance your tips feeling See more product details Voltage 12 Volts Manufacturer Facmogu Brand Facmogu Number of Channels 2