This is a versatile preamplifier compatible with multiple microphones, featuring three common input/output interfaces for excellent adaptability, and built-in 48V phantom power supply.HIGH GAIN: Mic preamplifier enhances your sound experience with balanced amplification circuitry with 38db gain, providing clean, transparent gain.LOW NOISE: Microphone preamp features a unique, fully balanced circuit design that produces ultra low noise and clean sound, ensuring minimal noise and adding no sonic coloration to your recordings.BLACK METAL CASE: Dynamic condenser microphone booster's black metal casing is not only rugged, but also low noise by effectively eliminating most EMC interference.COMPACT AND LIGHTWEIGHT: Microphone preamplifier is compact and lightweight, making it easy to carry and store. Perfect for home studios and professional studios, recording, podcasting and live streaming.Specification:Item Type: Microphone PreampInterface & Knob Functions:MIC IN: Microphone input ports (3.5mm, 6.5mm, XLR );MIC OUT: Microphone output ports (3.5mm, 6.5mm, XLR );POWER: Power switch;48V: Phantom power switch;GAIN: Gain adjustment knob (maximum 38dB);DC5V: DC power supply interface;Power Consumption: 0.2W (when 48V off), 1.8W (when 48V on);Frequency Response: 20Hz-20kHz;Total Harmonic Distortion (THD): 0.0023%;Input Impedance: Balanced XLR/6.35mm at 1.5KΩ;Output Impedance: Balanced 250Ω.Color: BlackMaterial: MetalPackage Contents:1*Microphone Preamp1*DC Cable