Waveshare Analog Test Board input/output integrated AD/DA MCUs MP3 Audio Amplifier LM386M Development Board Kit<div style="text-align: left;"><strong>[Product Information]</strong><ul><li id="replacementPartsFitmentBullet" class="aok-hidden" data-doesntfitmessage="We're not sure this item fits your " data-fitsmessage="This fits your "><span class="a-list-item"><span id="replacementPartsFitmentBulletInner"><a href="#" class="a-link-normal hsx-rpp-fitment-focus">Enter your model number</a>to make sure this fits.</span></span></li><li><span class="a-list-item"> supports MP3 output </span></li><li><span class="a-list-item"> adjusting input voltage level (0-3.3V， 2 channel) </span></li><li><span class="a-list-item"> high-precision adjustable resistor x 2 </span></li><li><span class="a-list-item"> analog input/output </span></li><li><span class="a-list-item"> For testing the integrated AD/DA function of MCUs </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41jyRMiIOjL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/413UXQPwZVL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51smSQnBaRL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51smSQnBaRL.jpg" noproxy>