Application: the MAX4466 microphone breakout is suitable for voice converters, audio recording and sampling, and audio response projects using On the back, there is a small trimmer pot to adjust the gain You can set the gain from 25x to 125x Parameters: power supply voltage: and2.4V to and5.5V (can be compatible with STM, and other development board motherboards) Power supply rejection ratio: 112dB Common mode rejection ratio: 126dB AVOL: 125dB (RL = 100 thousands of ohm meter) rail-to-rail output Quiescent power supply current: less than 24 microamp Gain bandwidth: 600kHz 20-20KHz electret microphone soldered on: comes with a 20-20KHz electret microphone soldered on the board for audio-reactive projects It is recommended to use the driver library, which can take audio input and 'translate' it into frequencies Easy to use: connect GND to ground, VCC to 2.4-5VDC For the good performance, use the 'quietest' supply available (this would be the 3.3V supply) Power supply noise rejection function: the amplifier has good power supply noise rejection colour: purple Material: ABS Package Contents: 10 x Amplifier for microphone Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.