Features: Brand new and high quality Control range: Control range of 7-band equalization circuit is 12dB. Equalization frequency band: 60Hz, 150Hz, 400Hz, 1KHz, 3KHz, 6.5KHz, 15KHz, composed of TI or ST original TL074. Basic parameters: 7-band sound equalizer preamplifier gain, 4580 classic operational amplifier provides 5X amplification (14dB); The input impedance is 20K, and the output impedance is 600. Adapting earphones: The NE5532 constitutes the balanced earphone amplifier of the 47 earphone driver circuit, which can easily drive various earphones with adjustable height. 3.5mm interface: The 3.5mm input interface supports a 4-pole plug, and the output is connected to a headset with a microphone, which can be used for normal voice calls on the mobile phone. In addition, there is a terminal of RCA interface. Aluminum alloy material: 7-band audio equalizer is made of aluminum alloy, with high strength, corrosion resistance, stable performance, DC5V - 12V power supply, dual channel sound. It is widely used in home/car audio/mobile phone/computer/game console and other devices. Specifications: Compatible Audio & Video Equipment Style: Amplifier,Earphones & Headphones,Speakers Model Number: Sound Equalizer Model: EQ-7 Material: Aluminum alloy Color: Black Plug: US Plug, EU Plug (optional) Power supply: DC5V-12V Interface: DC5.5x2.1/3.5mm Input impedance: 20K Output impedance: 600 Control range of equalizing circuit: 12dB Equalizing frequency band: 60Hz, 150Hz, 400Hz, 1KHz, 3KHz, 6.5KHz, 15KHz Product size: 115x85x30mm/4.53x3.35x1.18in Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement. Package includes: 1PC x 7 Band Digital Equalizer