Features Microphone Module: High sensitivity and low noise, high-performance MEMS microphone module is very stable and reliable. Reliable in works: the frequency is adjustable and the omnidirectional microphone module has low power consumption and digital I2S output. EXCELLENT FITTING: Applicable to MEMS MSM261S4030H0 microphone, the microphone module can work with Sipeed Maix development board. Including 2 sets: There are 2 sets of microphone modules in the kit, and this quantity will definitely meet your replacement needs. SIMPLE TO INSTALL - Comes with light weight and also compact size, the I2S microphone board has a pin header for easier installation. Specification: Item Type: Microphone Module Sensitivity: -26dB, dBFS at 1kHz, 1Pa Signal to Noise Ratio: 57dB, Bandwidth 20KHz, Weighing A Connection mode: 1 x 6P, 2.54mm interface Total Harmonic Distortion: <1%, 100dB SPL at 1kHz S=Nom, Rload>2k. Clock frequency: 1.0-4.0Mhz in normal mode 150-800KHz in low power consumption mode. Hardware Features: External Supply Voltage: 3.3V ± 0.2V External power current: >1mA Package List: 2 x Microphone Module 2 header pins Package List 2 x Microphone Module 2 x Pin Header