Features: The INMP441 is a high-performance, low power, digital-output, omnidirectional MEMS microphone with a bottom port. The INMP441 is available in a thin 4.72 x 3.76 x 1 mm surface mount package. It is reflow- solder for no sensitivity degradation. The INMP441 is halide free. 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. SCK: Serial data clock for I2S interface; WS: Serial data word selection for I2S interface; L/R: Left/Right channel selection. Applications: Teleconferencing Systems; Remote Controls ; Gaming Consoles; Mobile Devices ;Laptops Tablets ;Security Systems. Specifications: Digital with high-precision 24-bit data. High signal-to-noise ratio is 61dBA. High sensitivity -26dBFS. Stable frequency response from 60Hz to 15kHz. Low power consumption: low current consumption 1.4mAi. High PSR: -75dBFS. Interface definition: SCK: Serial data clock for I2S interface WS: Serial data word selection for I2S interface L/R: Left/Right channel selection. 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 of the I2S interface. VCC: Input power, 1.8V to 3.3V. GND: power ground Connect to ESP32: (INMP441 ESP32) SCK >> GPIO14 SD >> GPIO32 WS >> GPIO15 L/R >> GND GND >> GND Note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1Set x Omnidirectional Microphone Module