Feature:Onboard power amplifier chip, multiple filter capacitor, to ensure that the audio output is not distortedYou 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 Arduino Tone function, you can easily play musicIt can also be used for audio equipment external active amplifierThe speaker fixed in the box, the sound quality is betterSuitable for Arduino play music, a variety of audio equipment, such as external power amplifierSpecification:Size: 34 x 21mmFixed hole: 3mmPitch: 15mmSpeaker power: 0.5W / 8Speaker diameter: 50mmAmplifier chip: LM386Voltage: 5VPort: DigitalPlatform: Arduino, single chipPackage includes:1 x Power Amplifier Music Player Module