Welcome to the store! Usage: MAX4466 microphone breakout is suitable for voice converter, audio recording and sampling and sound response projects using; On the back there is a small trimmer potentiometer to adjust the gain; You can set the gain from 25x to 125x Parameters: power supply voltage: +2.4V to +5.5V (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 meters) rail-to-rail output; Quiescent current: less than 24 microamperes; Gain bandwidth: 600kHz 20-20KHz electret microphone soldered on: comes with a 20-20KHz electret microphone soldered on the board for sound 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 good performance, use the 'quietest' power supply available (this would be the 3.3V supply) Power supply noise suppression function: the amplifier has good power supply noise suppression Color: purple Material: ABS Package Contents: 10 x Microphone Amplifier Only the above package contents, 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 allowable measurement error is +- 1-3 cm. Your satisfaction is our top priority. We will provide you with the best service. If you find any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately and we will give you the best solution!