Fangrui Product Details [for Esp8266 Esp-12e]: It Is Fully Compatible With Esp8266 Esp-12e. [gpio 1 Into 2]: This Expansion Board Can Expand One Gpio Pin Of Development Board To Two, Which Is Convenient For Users To Reuse Pins For Large-scale Smart Home Projects. [2 Type Connections]: Two Connection Methods: Pin Header Connector Screw Terminal. Just Select Them According To Your Purpose. [double-layer Pcb]: The Expansion Board Is A Double-layer Board. One Pin Is Wired On Both Sides. Therefore, The Circuit Is Stable And Highly Reliable, And There Will Be No Poor Circuit Contact And Unstable Signal Mission. [updated Version]: Compared With The Previous Version, The Board Of This Version Has Been Soldered Completely. No Need To Solder Parts By Yourself, Which Is Very Convenient To Use. Colour: Green Material: Plastic Package Contents: 2 * Esp8266 Breakout Board Only The Above Package Content, Other Products Are Not Included. Note: Light Shooting And Different Displays May Cause The Color Of The Item In The Picture A Little Di