Overview
Quad GPIO expander for Raspberry Pi Pico, four sets of male headers for connecting more expansion modules, USB power input connector

Standard Raspberry Pi Pico female header for direct attaching Raspberry Pi Pico (if male header soldered), or just through jumper wires
Four sets of 2x20 male header, allows connecting more Raspberry Pi Pico expansion modules
USB power input connector, ensures sufficient power supply for multiple expansion modules
Breakout RESET button, convenient for debugging
Clear pinout labels on the front side, easy to use
Immersion gold process, beautiful & practical, stunning aesthetic looking

Package Contains
Pico-Quad-Expander x1

For more details you may need to know, pls firstly send me message via Amazon,
I will then send attached document including User Guide for you, thank you for patience.;D