ESP32 is already integrated antenna and RF balun, power amplifier, low-noise amplifiers, filters, and power management module. The entire solution takes up the least amount of printed circuit board area. This board is used with dual-mode Wi-Fi and Bluetooth chips, which is safe, reliable, and scalable to a variety of applications. 
<br />
<br />Features: 
<br />High performance-price ratio
<br />Small volume, easily embeded to other products
<br />DC 5V-12V 
<br />1 analog input(3.2V max input)
<br />A Micro USB connection
<br />Compatible with Arduino
<br />D1 R32=WiFi+Bluetooth+UNO
<br />
<br />Size: 6.8x5.3cm/2.68x2.09inch
<br />Quantity: 1 Pc
<br />Note: Due to the difference between different monitors, the picture may not reflect  the actual color of the item. Thank you!
<br />Compare the detail sizes with yours, please allow 1-4CM differs due to manual measurement, thanks!
<br />
<br />Package includes:
<br />1 Pc x Development Board<p> <b><b><img src="https://contestimg.wish.com/api/webimage/596f3ca59221540a605d087c-large.jpg"><img src="https://contestimg.wish.com/api/webimage/596f3ca59221540a605d087c-1-large.jpg"><img src="https://contestimg.wish.com/api/webimage/596f3ca59221540a605d087c-2-large.jpg"><img src="https://contestimg.wish.com/api/webimage/596f3ca59221540a605d087c-3-large.jpg"><img src="https://contestimg.wish.com/api/webimage/596f3ca59221540a605d087c-4-large.jpg"><img src="https://contestimg.wish.com/api/webimage/596f3ca59221540a605d087c-5-large.jpg></b></b></p>