Features 1.The audio signal of the condenser microphone as cylinder microphone pickup can be amplified. 2.Amplifier module will amplify the audio signal input from the audio input port and directly amplify the pickup signal of the onboard microphone. 3.Output of the board can be directly connected to the audio input terminal of the stereo or the audio input terminal of the computer to realize voice chat or voice amplification. 4.The amplifier board is equipped with a accurancy and high-quality operational amplifier core, which can realize the adjustable amplification gain. 5.With very little background noise, the sound is clear and bright, also such amplifier module keeps simple installation. Specification Item Type: Microphone Board Power supply: DC 2.6-10V Input: Equipped with a capacitive microphone (sensitivity 58D) Output: 3.5 audio output and 3P pin synchronization audio output ports L and G (G: audio ground) Board Size: Length: Approx. 45mm / 1.8in Width: Approx. 25mm / 1in Positioning Hole Diameter: Approx. 3.1mm / 0.1in Power Interface Plug Line: Approx. 15cm / 5.9in Package List 1 x Microphone Amplifier Module 1 x Pin 1 x Pin Header 1 x Interface Cable