This LM393 module works perfectly when you monitor sound. The microphone captures the audio waves and compares it using the LM393 comparator IC. The sensitivity of the digital output pin can be adjusted using the on-board potentiometer. The specifications of the LM393 sound sensor module are:

Note: Product may be differ from the picture shown here.

• Operating Voltage: 3.3V to 5V
• Output: digital
• Comparator IC: LM393