This breakout board allows you to connect additional circuits and hardware to the pins on the edge of the micro:bit. It provides access to a large number of processor pins allowing a lot of extra functionality to be added. *Provides additional I/O lines, access to buttons A and B, LED matrix outputs and I2C bus *21 Pins broken out to a row of solderable pads *PCB includes a prototyping area with 3V and 0V rows *Labelled pins and clear straightforward documentation *Supplied pre-built so no soldering required *Dimensions (LxWxH): 60x40x12mm