The OKY3139 is an audio module manufactured by OKYSTAR. It contains a microphone, an I2S bus, an integrated circuit (IC) INMP441, and a signal to noise ratio (SNR) of 61 dB. It has a frequency response range of 60 Hz-15kHz. It is designed to capture audio signals and provide high-quality audio output. This module is ideal for audio recording, telecommunications, and other audio applications.