This is an pre-assembled Arduino Protoshield. We assembled them to save our customer some time to focus on your circuits.
All Arduini pins are brought to this protoshiled. 5V, GND, digital I/O, analog input, and the RESET button, etc are all exposed to users. There is a BlueSMiRF socket for wireless communication between Arduino boards.
There are 2 general use LEDS and 1 general use button included on the board for you to play with.