HAT GPIO Expansion Board + Cable For Raspberry Pi 2 Model B \/ B+ \/ A+ The HAT GPIO Expansion Board is ideal for debugging your HAT projects or combining a HAT with other circuits. Features: HAT spec landing area with PCB standoffs Includes 40 pin GPIO ribbon cable All GPIO pins labelled with function, BCM pin number, physical pin number Rubber non-slip feet 4 mounting holes Package includes: 1 x Expansion board w\/ install screws 1 x 40-Pin data cable (20cm) Test photos for reference only, the package does not contain testing modules: