Feature: 1. 3 Band Equalizer: The 3 band equalizer makes this device a 2 in 1 product (phono preamp and equalizer). The simple interface allows you to easily adjust left right channel balance, volume control, and high, mid, low equalization, enhancing your listening experience and providing exceptional sound quality with personalized sound characteristics. 2. 3 Frequency Control: By enabling left right channel balance adjustment, volume control, and 3 band equalization, you can effortlessly achieve the balance. Customizable sound levels are suitable for all types of music, including rock, jazz, and more. 3. Signal Processing: The signal processing circuit uses the TI NE5532 operational amplifier, ensuring that your turntable's sound levels are boosted to speaker or stereo line level, providing better volume and higher sound quality with HIFI and low noise. 4. Isolated Boost Power Supply: The device features an isolated boost power supply that ensures signal purity and a wide dynamic range. With the isolated power supply, there is no concern about ground interference, even in car use. The silent circuit ensures there are no thumping noises during power on off, powered by 5V. 5. Aluminum Alloy Material: The 3 band equalizer is made from aluminum alloy, rustproof, sturdy, compact, and long lasting, which offers high strength and stable performance. Specification: Item Type: Phono Preamp Material: Aluminum Alloy Power Supply: 5V Power Consumption: 0.5W Input Output Interface: Turntable Interface Frequency Response: 20Hz-20kHz Gain: 12db Equalization Range: ±15db Input Impedance: 50KΩ Output Impedance: 600Ω Knob and Interface Functions: BALANCE: Adjust Left and Right Channel Volume Balance VOLUME: Adjust Volume Level LOW, MID, HIGH: Adjust Low, Mid, High Tone Respectively IN: Stereo Sound Input OUT: Stereo Sound Output 5V: Power Interface, Compatible with Phone Charger, Computer USB Port, Car Charger, Power Bank, etc.. Package List: 1 x Phono Preamp 1 x USB Cable