ESP8266-DevKitC is an Espressif compact development board based on ESP8266 modules. All of the I/O pins of the module are broken out to the female header connectors on both sides of the board for easy interfacing. Developers can connect these pins to peripherals as needed. Module is FCC/ CE/ KCC/ IC/ TELEC/ SRRC/NCC certified. https://www.campuscomponent.com/products/espressif-esp8266-devkitc-02d-f-2-4-ghz-wifi-development-board/2208614000001841070