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MAX4466 Sound Sensor Module MAX9814 Sound Control Sensor KY-037 Switch Detection Whistle Switch Microphone Amplifier For Arduino - AliExpress
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MAX4466 Microphone Amplifier Board Adjustable Gain OUT GND VCC DC 2.4-5V For Arduino Microphone Speakers
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Electret Microphone Amplifier - MAX4466 with Adjustable Gain : ID 1063 : $6.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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