DIYmall ESP8266 ESP-01S WiFi Serial Transceiver Module with 1MB Flash(pack of 2pcs)<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"> The PCB layout has changed for an improvement in WiFi radio performance </span></li><li><span class="a-list-item"> 1MB Flash Memory...upgraded from 512KB </span></li><li><span class="a-list-item"> Latest version esp-01s，with stronger signal </span></li><li><span class="a-list-item"> Document link: https://nurdspace.nl/ESP8266， video link video link:https://youtu.be/mS2kQVD5Sxw </span></li><li><span class="a-list-item"> What You Get: 2 X ESP8266-01S Module. Our 1 Year Warranty and Friendly Customer Service. </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/51EGnPVO6zL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51qHC0PhrCL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41mVrp59bpL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51L12pkpJHL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41CG2K8IahL.jpg" noproxy>