ESP8266 Breakout Board Specifications:
PCB layers: 2 layers
Size: 6.3 * 6.3 * 1cm
Color:Black+Green
Material:Top quality FR-4 material
Connect way:Pin Header Connector & Screw Terminal

ESP8266 Breakout Board Features:
Perfect Compatibility: The terminal breakout board is only fit ESP8266 ESP-12E NodeMCU Development Board ;
The expansion board is design with double-layer that One pin is wired on both sides. Stable and highly reliable.Great contact and stable signal transmission for your ESP8266 ESP-12E NodeMCU Development Board
2 Type Connections: Two connection methods, Pin Header Connector & Screw Terminal. Please find which one would you prefer according to your purpose.
This expansion board can expand one GPIO pin of ESP8266 development board to two, which is convenient for you to reuse all pins in projects. Nice breadboard alternative.

Product list:
4PCS ESP8266 Breakout Board GPIO 1 into 2 for ESP8266 ESP-12E NodeMCU Development Board