STMicroelectronics STEVAL-MIC005V1 Microphone Coupon Board is a compact daughter board that includes four MP23DB02MM Microphones. The MP23DB02MM is an ultra-compact, low-power, omnidirectional, digital MEMS microphone built with a capacitive sensing element and an IC interface with optional stereo configuration. The Coupon Board concept allows easy performance testing of STMicroelectronics MEMS microphones. The STEVAL-MIC005V1 Coupon Board is designed to be used with the X-NUCLEO-CCA02M2 Expansion Board. It can also be broken into four separate mini boards, each hosting a single microphone.