Specification Brand : Tyenaza BulletPoint : DC8-24V TPA3118 PBTL 60W Mono Digital Audio Board AMP Module Chip 1X60W 4-8 Ohms Replace TPA3110 For Arduino BulletPoint1 : Soldered 20-20KHz electret microphone on board BulletPoint2 : The pin has good performance, ensure stable working BulletPoint3 : Use the op amp MAX4466 designed for amplifiers BulletPoint4 : Ideal for projects that use FFT, such as voice converters, audio recording amplifiers, and audio reaction projects BulletPoint5 : On the back side, include a small trimmer potentiometer to adjust the gain. The gain can be set from 25 times to 125 times, down to about 200mVpp (normally, about 6 inches away) ItemName : Tyenaza 2Pcs Electret Microphone Amplifier, Adjustable MAX4466 Electrical Equipment ItemPackageDimensions_Height : 2 centimeters ItemPackageDimensions_Length : 8 centimeters ItemPackageDimensions_Width : 6 centimeters ItemTypeKeyword : electronic-component-audio-amplifiers Manufacturer : Tyenaza ModelName : Tyenaza573yvbewd9 ModelNumber : Tyenaza573yvbewd9 PartNumber : Tyenaza573yvbewd9 ProductDescription : Item Type: Electret Microphone Amplifiers GND: Ground VCC: Connect to 2.4-5VDC OUT: Audio waveform output pin