Specification Brand : Wisoqu BulletPoint1 : This module uses professional microphone amplifier IC, which possess high sensitivity BulletPoint2 : Sound sensor module have small volume and low output noise, the fixed gain is 20dB, support 3.3v and 5v BulletPoint3 : Low power consumption of sensor is easy to control, more stable and more efficient BulletPoint4 : Microphone sound sensor module possess small size, more and simpler installation BulletPoint5 : The sound sensor is suitable for assembly, and installed on various small equipment like microphone and robot Color : #511 ItemName : Sound Sensor Module, 5Pcs Microphone Sensor High Sensitivity Sound Detection Module, Ultra Small Professional Microphone Amplifier IC, 3-5V ItemPackageDimensions_Height : 5 centimeters ItemPackageDimensions_Length : 15 centimeters ItemPackageDimensions_Width : 10 centimeters ItemTypeKeyword : microphone-elements Manufacturer : Wisoqu ModelName : Wisoqu03o2saw9hg ModelNumber : Wisoqu03o2saw9hg PartNumber : Wisoqu03o2saw9hg ProductDescription : Specification: Item Type: Sound Sensor Module Voltage: 3-5V AO: Analog output, real-time output of microphone voltage Do: When the sound reaches a certain threshold, output high and low level . (threshold sensitivity can be adjusted by potentiometer) 1. There are approx. 3mm / 0.1in mounting screw holes 2. Use 5V DC power supply 3. With analog output 4. Threshold flip level output 5. High sensitivity microphone 6. With power indicator 7. The comparator output has indicator lights