Product introduction: The INMP441 is a high performance, low power, digital output, omnidirectional MEMS microphone with bottom port. The The complete INMP441 solution consists of a MEMS sensor, signal conditioning, analog to digital converter, anti-aliasing filter, power management and industry standard 24-bit I2S interface. The I2S interface allows the INMP441 to be connected directly to digital processors such as DSPs and microcontrollers without the need for an audio codec for use in the system. The INMP441 has a high signal-to-noise and is an choice for near field applications. The INMP441 has a flat wideband frequency response that results in high definition of natural sound. Product Features: Digital I2S interface with high precision 24-bit data 2. High signal-to-noise is 61 3. High sensitivity-26 dBFS 4. Stable frequency response from 60Hz to 15kHz Low power consumption: low power consumption 1.4 mA 6.High PSR: -75 dBFS Interface definition: : Serial data clock for I2S interface WS: Serial data word for I2S interface L / R: Left / Right channel . When set to low, the microphone outputs a signal on the left channel of the I2S frame. When set to high level, the microphone outputs signals on the right channel SD: Serial data output from the I2S interface. VCC: Input power, 1.8 V to 3.3 V. GND: power ground Connect to ESP32: INMP441 ESP32 --GPIO14 SD--GPIO32 WS--GPIO15 L / R--GND GND--GND --VDD3.3 Colour:Black Material:ABS Package Contents: 5 * Omnidirectional Microphone Module Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.