This is a High Quality ESP8266 Arduino Compatible UNO R3 Development Board ESP8266 Upgraded WeMos D1 R2 WiFi UNO Development Board Based

Description:

Based on the ESP-8266EX. You can use it on IDE.
11 Digital I/O pins
1 Analog Input pin
OTA -- Wireless Upload(Program)
On board switching power supply -- Max 24V input, 5V 1A output
Package Included:
1 X D1 WiFi uno based ESP8266