This is a professional car audio graphic equalizer with variable gain adjustment and high-level speaker input for ease of use. It features 6-channel front, rear, and subwoofer auxiliary stereo outputs, significantly enhancing the in-car audio experience and ensuring powerful, clear audio signals for the amplifier and speakers. It supports CD and AUX (2-channel) inputs and includes an AUX gain knob and a CD/AUX input switch for convenient and flexible input mode switching. Personalization is supported, including subwoofer volume, subwoofer frequency, volume balance, and precise Hertz adjustment to meet diverse listening needs. Specifications: Power Supply: DC 12V Maximum Output Voltage: 8V RMS Equalizer Range: 12dB Subwoofer Frequency: 30Hz-120Hz Upgraded Features: Karaoke function with microphone External sound input sensitivity adjustment Material: Metal Color: Black Package Contents: 1 x Car Equalizer Note: Includes only the above; other accessories are not included. Due to light reflection and monitor differences, the colors in the picture may differ slightly from the actual product; the allowable measurement error is ±1-3 cm.