Description: 【Enhanced Microphone Sensitivity】: This transistor voice amplifier is designed to boost the sensitivity of your microphone without altering its timbre or adding unwanted line noise, ensuring a clear and authentic sound experience 【 to Noise Ratio & Low Distortion】: Enjoy sound with a to noise ratio exceeding 100dBA at GAIN=10, and minimal distortion levels as low as >0.0021% at GAIN=10, ensuring crisp and clean audio output 【Compact Design】: Crafted from metal, this amplifier measures just 19.5cmx10cmx4cm/7.68inchx3.94inchx1.57inch, making it both sturdy and compact enough for easy integration into any studio or live performance setup 【Complete Package with Easy Setup】: The package includes everything you need for quick installation, powered by a DC12V1A supply voltage, making it for most dynamic and condenser microphones requiring power supply up to 48V 【Independent Power Switch】: This headphone amp has a power switch, which is convenient for you to turn on/off the headphone amplifier to save energy and reduce the hassle of turning off the power Specification: Material: Metal  Power supply : 48V Gain range :19dB(min)~75dB(MAX) Frequency response :20HZ 50KHz(+ 0.05dB) to noise ratio (GAIN= 10):> 100dBA to noise ratio (GAIN=1000):>87dBA Distortion degree :(GAIN= 10):>0.0021% Distortion degree :(GAIN=1000):>0.0013% Dynamic range (GAIN=10):>100dB Dynamic range (GAIN=1000):>88dB Supply voltage :DC12V1A Size Chart: 19.5cmx10cmx4cm/7.68inchx3.94inchx1.57inch Package Includes: 1 Set Portable Stereo Audio Amp Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.