This breakthrough board is specially made for Raspberry Pi Pico, with additional pin headers, which are fully compatible with the board The pin header and the breakthrough board are not welded, just insert pico after the welding is successful The breakthrough board is gold-plated on both sides and holes are plated, and the material of the PCB board is excellent The breakthrough board is equipped with Raspberry Pi pico, which is convenient for users to develop and integrate flexibly Note: The package does not include Raspberry Pi pico. This product needs to be assembled and welded by itself