This microphone, sound detection module has two outputs: 1. AO, analog output, real-time output voltage signal of the microphone 2. DO, when the sound intensity reaches a certain threshold, the output high and low signal It supports night detecting mode, adjustable repeat trigger time and detecting distance by adding SMD components to the corresponding pins. Specifications Input Voltage: 5V Analog Output: A0 Digital Output: D0 LED: A power indicator light Board Size: 34.6 x 15mm Package Includes 1 x Sound Sensor Module [mx_insert-post-ebay slug="ebay-t-default"] SKU: SEN0-002 Category: Sound Sensors Tags: microphone, sound