You can use it simply by adjusting the button according to your microphone’s type.
The CVM-AX1 audio mixer is suitable for most microphones. Simply toggle the switch to choose the audio output mode to stereo to mono It also has two volume adjustment buttons that allow you to independently control the input volume. The CVM-AX1 audio mixer has two mono output jacks and one stereo output jack, supporting two 3.5mm microphones or multiple sets of wireless microphones.