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This internal motherboard port multiplier converts a single USB 3.0 19Pin header into two independent USB 2.0 9Pin female ports, easily solving insufficient internal motherboard interfaces. Built-in hub chip ensures stable signal transmission and reliable power supply. Compact lightweight design fits neatly inside computer cases without occupying extra space. It is widely used for connecting wireless network cards, Bluetooth adapters, liquid cooling controllers and other USB 2.0 internal devices, ideal for PC DIY assembly, hardware upgrading and internal port expansion.