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This internal header adapter cord connects motherboard USB3.0 20Pin female slot to USB2.0 9Pin female header, allowing modern motherboards equipped with 20Pin USB3.0 header to match traditional USB2.0 front I/O panels. It works at USB2.0 specification for daily peripherals including flash drives, keyboards and mice. Made with durable insulated casing and high-quality internal wiring for stable long-term chassis usage. Plug-and-play with zero driver installation required, an economical DIY accessory for PC case refitting and front USB port reuse.