4pcs GY-MAX4466 Electret Microphone Amplifier, with Adjustable Gain Control for Arduino (4 Pieces)

The MAX4466 is a micropower operational amplifier optimized for use as a microphone preamplifier. The use is simple: connect GND to mass, VCC with 2.4-5VDC. For best performance, use the "quietest" power supply available (for an Arduino this would be the 3.3 V power supply). Widely used in mobile phones, digital repeaters, headphones, hearing aids, microphone preamps, portable computers and voice recognition systems. Continuously adjustable gain: the gain can be adjusted via a potentiometer of 2