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This 19Pin USB 3.1 front panel header adapter cable converts your motherboard internal 19Pin interface into USB-C and 4-port USB 3.0 hub expansion. Designed to perfectly fit 3.5-inch floppy drive bays, it enables neat built-in chassis installation and front-panel port access. It supports high-speed USB 3.1 data transmission, delivering stable and efficient connection for U disks, external hard drives and other peripherals. Simple wiring and tool-free use, ideal for upgrading desktop PC front I/O connectivity and optimizing cable arrangement.