3pcs UNO+WiFi R3 ATmega328P+ESP8266, 32Mb flash, USB-TTL CH340G, Micro-USB and USB Cable

3x UNO+WIFI board
3x USB Cable

These boards have the ESP8266 AT Firmware loaded - uploading any new sketch with erase firmware.
These are not for novice users, the require dip switches to be set for different configurations, and there is no manual You will need to search pages on how to use them on various Arduino related sites like Instructables, Arduino Site, Github etc. 

Specifications

MicrocontrollerATmega328
IC Wi-Fi ESP8266
USB-TTL converterCH340G
Power Out5V-800mA
Power IN. USB5V (500mA max.)
Power IN. VIN/DC Jack9-24V
Power Consumption5V 800mA
Logic Level5V
WifiWi-Fi 802.11 b/g/n 2.4 GHz
USBMicro USB
Clock Frequency16MHz
Operating Supply Voltage5V
Digital I/O14
Analog I/O6
Memory Size32Mb
Interface Typeserial\OTA
Operating temperature−40С°/+125С°
Length×Width53.34×68.58mm
Weight8
antennaBuil-in\external antenna

It is a customized version of the classic ARDUINO UNO R3 board. Full integration of microcontroller Atmel ATmega328 and IC Wi-Fi ESP8266 with 32 MB flash memory, and USB-TTL converter CH340G on one board. All modules can work together or independently.