This board redirect all the pins 2*13 to your breadboard in the same arrangement, you can easily operation your project on the breadboard now with it. The name of the pins is shorten, for example, “G~1” stands for GPIO1.
To use this board, an extra 2*13 cable is necessary for connecting between raspberry pi and breadboard.
For the packaging, the black box header is soldered, but the pins inserted into the breadboard is not yet soldered but included.
You may need to get the extra 2×13 cable for ithere.