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 Preamp Interface & 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: Black Material: Metal Package Contents: 1*Microphone Preamp 1*DC Cable