This ESP8266 Serial Wireless WIFI Module Adapter Plate is for ESP-07, ESP-08, ESP-12E ESP8266 SMD ESP8266 Module. These SMD ESP8266 modules have an unfriendly pin pitch. But by use of this adapter PCB, you can solder ESP-07, ESP-08 or ESP-12E modules and can use your favourite ESP8266 SMD modules on breadboards or on perforated boards.