Waveshare Sound Sensor Overview 1. Onboard audio power amplifier LM386 2. Audio signal gain up to 200 3. Adjustable accuracy 4. Signal output indicator Specifications 1. Mic sensitivity: 52dB 2. Frequency range: 50Hz ~ 20KHz 3. Power: 3.3V ~ 5.3V 4. Mounting holes size: 2.0mm Applications 1. Audio amplifier 2. Ambient sound detection 3. Sound level detection (unable to get exact dB value) How to Use In the case of working with a MCU: 1. VCC: 3.3V ~ 5.3V 2. GND: Power supply ground 3. AOUT: MCU.IO (analog output) 4. DOUT: MCU.IO (digital output) Package Contents 1. Sound Sensor x1 2. 4-pin custom connector jumper wire x1 Tips: We sincerely hope that you can leave your Comment and share your experience of using the product so that more friends can know about it