Adafruit 2821 Feather Huzzah with ESP8266 Wi-Fi
Brand: Adafruit
Measures 2.0" x 0.9" x 0.28" without headers soldered in
4Mb of flash and built in wifi 802.11 b/g/n
Reset button
Pin #0 red led for general purpose blinking. Pin #2 blue led for bootloading debug & general purpose blinking
Power/enable pin and 4 mounting holes