ITEM NAME:GY-MAX4466 Electret Microphone Amplifier Module, Pack of 3 Description: - Add an ear to your project with this well-designed electret microphone amplifier. - This fully assembled and tested board comes with a 20-20KHz electret microphone soldered on. - For the amplification, we use the Maxim MAX4466, an op-amp specifically designed for this delicate task! - The amplifier has excellent power supply noise rejection, so this amplifier sounds really good and isn't nearly as noisy or scratchy as other mic amp breakouts we've tried! - This breakout is best used for projects such as voice changers, audio recording/sampling, and audio-reactive projects that use FFT. Specification: - Material: PCS Board - Color: Purple - Size: Approx. 0.2x0.2x0.2inch Package Included: 3 Pieces Electret Microphone Amplifier Note: Pls allow an error of 1-3mm due to the difference of manual measurement..For the amplification, we use the Maxim MAX4466, an op-amp specifically designed for this delicate task! - Add an ear to your project with this well-designed electret microphone amplifier. 3 Pieces Electret Microphone Amplifier.