This product is supplied with Straight Double Row PCB Pin Headers already soldered to the breakout board. Features: Features a dedicated pin strip for quick and easy prototyping. Breaks out 21 pins from the edge of the BBC micro:bit. Dedicated prototyping area with 3V and 0V rows. Labelled pins and clear straightforward documentation. Contents: 1 x Edge Connector Breakout Board for the BBC micro:bit, Pre-built. Dimensions: Length: 60mm. Width: 40mm. Height: 11.8mm.