This sensor is a high performance, low power, digital output, omnidirectional MEMS microphone with bottom port. Compatible with INMP441. 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 ratio and is an excellent choice for near field applications. The INMP441 has a flat wideband frequency response that results in high definition of natural sound. Note: Installation guide not included, we strongly recommend you professional installation. Please check as much as possible to make sure the item is what you need. Main features: Digital I2S interface with high 24-bit data High SNR of 61 High sensitivity -26 dBFS Stable frequency response from 60 Hz to 15 kHz Low power consumption: Low current consumption of 1.4 mA High PSR: -72 dBFS Interface definition: : Serial data clock for the I2S interface : Serial data word selection for the I2S interface L/R: Left/right channel selection: Set to low power level, the microphone outputs a signal in the left channel of the I2S frame. Set to high power level, the microphone outputs a signal in the right channel. SD: Serial data output for the I2S interface VCC: Input power, 1.6V to 3.6V GND: Power source Connect to ESP32 development board: This module - ESP32 development board -- GPIO14 SD -- GPIO32 -- GPIO15 L/R -- GND GND -- GND -- VDD3.3 Color: As Shown Material: plastic Package Conten: 10*Omnidirectional Microphone Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.