This board is encapsulated by the newest 4M Flash ESP8266-12F module which makes it more stable and provides better performance.
ESP8266 ESP-12F Wifi development board
Pin headers are included but needed to be soldered on yourself
Left and right side pins are lead out, one analog pin lead out.
On board CH340 USB-TTL convert, Reset button.
Arduino IDE supported, no need to press button for entering flashing mode