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This 50cm expansion cable connects motherboard 19/20Pin USB3.0 header and Type-E internal header, expanding to rear panel USB-C and USB 3.0 dual female ports. The USB-C interface delivers 10Gbps ultra-fast data transfer, while the USB 3.0 port provides steady 5Gbps bandwidth for daily peripherals. Designed for standard PCI-E chassis back panel installation, it fits perfectly into ordinary expansion slots for firm mounting. Flexible 50cm length keeps internal wiring neat and unobstructed. Plug and play without extra drivers, ideal for desktop motherboard interface expansion, connecting external SSDs, U disks, phones and other USB-C & USB-A devices.