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This flat PCBA adapter converts dual USB 3.0 Type-A female ports to standard motherboard 19/20 pin header slot, enabling convenient internal USB port expansion for desktop PCs. The slim flat body saves precious chassis internal space and avoids installation obstruction. Built with high-quality PCBA circuit board, it provides stable conductivity and reliable USB 3.0 high-speed transmission performance. Simple plug-and-play installation without extra drivers, perfectly solving front panel USB port replacement, expansion and layout conversion needs for DIY computer assemblies.