Sound Detection Module Sensor for Intelligent Vehicle Compatible With Arduino is a Single channel signal output Sensor. The output is effective to the low-level sound signal with good fidelity, When there is sound, outputs low level and signal light. It can be used for Acoustic control light, give sound and light alarm working with the Photosensitive sensor, and sound control, sound detect. (The Maximum induction distance is 0.5M) 1. The module has 2 outputs: AO, analog output, real-time output microphone voltage signal; DO, when the sound intensity reaches a certain threshold, it outputs high and low level signals, [threshold-sensitivity can be adjusted by potentiometer]. 2. There are 3mm mounting screw holes, which are powered by a 5v DC power supply. 3. There is an analog output with a threshold flip level output. 4. High sensitivity microphone with high sensitivity. 5. There is a power indicator and the comparator output has an indicator.