10 Pieces Electret Microphone Amplifier Adjustable MAX4466 Module Microphone Preamplifier Blue Breakout Board Compatible with Arduino : Amazon.in: Musical Instruments
Amazon.com: Alctron MA-3 Dynamic and passive ribbon gain adjustable mic amplifier, 25dB gain adjustable. studio, stage performance : Musical Instruments
Electret Microphone Amplifier - MAX4466 with Adjustable Gain : ID 1063 : $6.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Electret microphone with amp MAX4466 - Boutique Semageek