This board allows you to use ESP-07/ESP-12/ESP8266MOD (and other pin-compatible) modules with a breadboard (and more) without having to solder the module in place. All you need are FlexyPins!
There are many other similar ESP8266 modules that might have different marking, to make sure your module is compatible with this adapter, compare your module's pinout and dimensions to the ESP-12 datasheet available here.
It's a great way to create testing/flashing jigs, or just experiment with the module without the commitment of soldering it.
A soldering guide is available here: https://www.youtube.com/watch?v=VZVIUo6SYR0
We usually package the orders during the weekend and drop them off on Monday.