Specification: Item Type: 7 Band Sound Equalizer_x000D_Material: Aluminum Alloy_x000D_Power Supply: DC5V-12V_x000D_Interface Specification: 5.5x2.1_x000D_Input Impedance: 20K_x000D_Output Impedance: 600 Ohms_x000D_Equalization Circuit Control Range: 12dB_x000D_Equalization Frequency Band: 60HZ,150HZ,400HZ,1KHZ,3KHZ,6.5KHZ,15KHZ Features: 1Control Range: 7 band equalization circuit control range 12dB, equalization band: 60HZ,150HZ,400HZ,1KHZ,3KHZ,6.5KHZ,15KHZ, by TI or ST original TL074 composition. 2Basic Parameters: 7 band sound equalizer preamplification gain, 4580 classic op amp provides 5 times amplification (14dB); input impedance 20K, output impedance 600 ohms. 3Compatible with Headphones: sound equalizer ear amplifier part of the NE5532 composed of type 47 headphone driver circuit, easy to drive all types of headphones, adjustable high and low. 43.5mm Interface: 3.5mm input interface supports 4 pole plug, the output connects to the headset with a microphone, which can be used on cell phones for normal voice calls, and another terminal with a group lotus interface is available. 5Aluminum Alloy: The 7 band car sound equalizer is made of aluminum alloy, high strength, corrosion resistance, stable performance, DC5V?12V power supply, dual channel sound. PackageList: 1 x7 BandSoundEqualizer 1 x Power Supply Cable