3Pcs Speaker Module Power Amplifier Music Player Module Electronic Building Blocks Geekcreit for Arduino - products that work with official Arduino boardsFeature: Onboard power amplifier chip, multiple filter capacitor, to ensure that the audio output is not distorted You can fine tune the output volume through the potentiometer (because of space constraints, can not use the index potentiometer, the volume can only be adjusted in a small range) With Tone function, you can easily play music It can also be used for audio equipment external active amplifier The speaker fixed in the box, the sound quality