Product introduction: The INMP441 is a high-performance, low-power, digital output, omnidirectional MEMS microphone with 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 the need for an audio codec. The INMP441 offers a high signal-to-noise ratio, making it ideal for near-field applications. It features a flat wideband frequency response for clear and natural sound reproduction. Product Features: - Digital I2S interface with 24-bit high-precision data output - High signal-to-noise ratio of 61 dB - High sensitivity of -26 dBFS - Stable frequency response from 60 Hz to 15 kHz - Low power consumption: 1.4 mA - 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 low, the microphone outputs on the left channel; when set high, it 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 - 3.3 V 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. Lighting and display settings may cause slight variations in the color of the item shown in the image compared to the actual product. Measurement may vary by +/- 1-3 cm.