1Soldered 20-20KHz electret microphone on board 2The pin has good contact performance, ensure stable working 3Use the op amp MAX4466 designed for amplifiers 4Ideal for projects that use FFT, such as voice converters, audio recording amplifiers, and audio reaction projects 5On the back side, include a small trimmer potentiometer to adjust the gain. The gain can be set from 25 times to 125 times, down to about 200mVpp (normally, about 6 inches away)<br>Item Type:Electret Microphone AmplifiersGND: GroundVCC: Connect to 2.4-5VDCOUT: Audio waveform output pin<br> .wang-edit-text{<br> font-family:'Arial' !important;<br> }<br> .wang-edit-text table {<br> border-top: 1px solid #000;<br> border-left: 1px solid #000;<br> }<br> .wang-edit-text table td,<br> .wang-edit-text table th {<br> border-bottom: 1px solid #000;<br> border-right: 1px solid #000;<br> padding: 3px 5px;<br> }<br> .wang-edit-text table th {<br> text-align: center;<br> }<br>2 xElectret Microphone Amplifiers