ITEM NAME:MAX9814 Electret Microphone Amplifier decodificador audio Board Module With AGC.1 MAX9814 Electret Microphone Amplifier Module. AGC switch: when you don't answer the jumper cap, AGC function is open, connected to the jumper cap is closed (with a jumper cap). Suitable for hearing aids, conference microphone, loudspeaker and other devices.
