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This internal header adapter is built to link motherboard USB 2.0 9Pin female header to USB 3.0 20Pin male connector, enabling older mainboards to match common USB3.0 front panel modules directly. It transmits data at USB2.0s maximum 480Mbps speed to support flash disks, keyboards, mice and other daily small peripherals. Constructed with robust black insulating jacket and fine internal wiring for stable long-term use inside computer case. No extra driver needed after plugging in, ideal for DIY PC modification, case replacement and legacy computer port upgrading.