DIY PT2399 Microphone Amplifier Board Digital Kara OK Reverberation Reverb Module<br>Feature:<br>This product circuit design is reasonable， beautiful， low noise， reverberation continuously adjustable input voltage 12-24V.Support electret (computer condenser microphone) and two dynamic microphones<br>Note: This product is not supply any instructions， please note about this before order it. Sorry for the inconvenience.<br>Package included:<br>1 x DIY Microphone Amplifier Board