Dual GPIO expander for Raspberry Pi Pico, two sets of male headers for connecting more expansion modules^^Standard Raspberry Pi Pico female header for direct attaching Raspberry Pi Pico (if male header soldered), or just through jumper wires^^Two sets of 2x20 male header, allows connecting more Raspberry Pi Pico expansion modules^^Clear pinout labels on the front side, easy to use^^Immersion gold process, beautiful & practical, stunning aesthetic looking