ESP8266 ESP-12E UART WIFI Wireless Shield Development Board for Arduino UNO R3

Pin interface compatible with standard spacing Arduino Uno, Mega, etc.    
3.3V power supply chip (same with the official expansion board power chip CC3000 ).    
Onboard ESP8266-12 stable industrial grade serial WiFi module, using an enhanced PCB antenna    
Can switch by DIP switch ESP8266-12 stable industrial grade WiFi module operation mode (such as operating mode and upgrade mode), integrated serial port chip    
Built-in 5V to 3.3V TTL level converter,    
Onboard standard pitch leads all interfaces ESP8266-12 stable industrial grade WiFi module    
Onboard four LED displays the status of ESP8266, namely PWR, DFU, AP, STA