Description:
The back includes a small trimmer pot to adjust the gain.
The output is rail-to-rail, so when the sound gets louder, the output goes up to 5Vpp!
You can set the gain from 25x to 125x. This is about 200mVpp (about 6" away at normal speaker volume) for anything you would expect a "line level" input without clipping, or down to about 1Vpp which is ideal for reading from a microcontroller ADC. suitable for connecting to.

how to use:
Connect GND to ground and VCC to 2.4~5VDC.
The audio waveform is output from the OUT pin. The output has a DC bias of VCC/2, so when it's completely quiet the voltage will be a steady VCC/2 volts (DC coupled).
If your audio equipment requires AC-coupled audio, please connect a 100uF capacitor between the output pin and the input terminal of your device.
The 100uF cap is not required when connecting to an audio amplifier that includes differential inputs or decoupling capacitors.
The output pins are not designed to drive speakers or anything like that, but the smallest headphones you can't put in your ears will work with an audio amplifier (such as a 3.7W stereo amplifier)
If you want to connect the amplifier directly to the speakers. No amplifier or decoupling capacitors are required when connecting to microcontroller pins. Connect the OUT pin directly to the microcontroller's ADC pin.
For audio-reactive projects, we recommend using an FFT driver library that takes audio input and converts it to frequencies.

Power supply voltage: +2.4V~+5.5V (can be directly connected to the main board of development boards
Power rejection rate: 112dB
Common mode rejection rate: 126dB
AVOL: 12dB (RL = 100KΩ) rail-to-rail output
Electrostatic power supply current: Gain bandwidth: 600KHz
Size: 20.8mm * 13.8mm * 7.5mm

Package Included:
3 X MAX4466 Electret Microphone Amplifier Module