Product introduction: The INMP441 is a high-performance, low-power, digital output, omnidirectional MEMS microphone with a bottom port. The complete INMP441 solution includes a MEMS sensor, signal conditioning, analog-to-digital converter, anti-aliasing filter, power management, and an industry-standard 24-bit I2S interface. The I2S interface allows the INMP441 to be directly connected to digital processors such as DSPs and microcontrollers without requiring an audio codec.The INMP441 offers a high signal-to-noise ratio and is ideal for near-field applications. It features a flat wideband frequency response that delivers clear and natural sound reproduction.Product Features: 1. Digital I2S interface with 24-bit high-precision data output 2. High signal-to-noise ratio: 61 dB 3. High sensitivity: -26 dBFS 4. Stable frequency response from 60 Hz to 15 kHz 5. Low power consumption: 1.4 mA 6. High PSR: -75 dBFS Interface Definition: SCK: Serial data clock for I2S interface WS: Serial data word select for I2S interface L/R: Left/Right channel selection - When set to low, the microphone outputs on the left channel - When set to high, the microphone outputs on the right channel SD: Serial data output from I2S interface VCC: Power input, 1.8 V to 3.3 V GND: Power ground Connection to ESP32: INMP441 – ESP32 SCK – GPIO14 SD – GPIO32 WS – GPIO15 L/R – GND GND – GND VCC – VDD3.3 Color: Black Material: ABS Package Contents: 5 x Omnidirectional Microphone Module Note: The package includes only the items listed above. Other products are not included. Note: Lighting and display differences may cause slight variations in color between the image and the actual product. Measurement tolerance is +/- 1-3 cm.