Feature Highlights: 1. Universal Compatibility: This PCI-E to USB 3.0 expansion card works with a wide range of systems, including Windows XP through Windows 10, various Linux distributions, and DOS. It seamlessly fits into PCIe x1, x4, x8, or x16 slots on your motherboard. 2. SuperSpeed USB 3.0 Performance: Experience blazing-fast data transfers with speeds up to 5Gbps. It's fully backward compatible, so you can still use your older USB 1.5/12/480Mbps devices without any hassle. 3. Stable & Reliable Power: Features a dedicated external power socket to ensure stable and sufficient power delivery to each USB 3.0 port, enabling smooth operation for high-power devices. 4. Simple Plug-and-Play Installation: Get two extra high-speed USB ports in minutes. Just slot the card into an available PCI-E slot on your motherboard—no complicated setup or drivers needed for most modern operating systems. 5. Durable Construction: Built with a robust black PCB board, this expansion card is designed for steady, long-term performance and reliable daily use. Product Details: Add two high-speed USB 3.0 ports to your desktop computer easily. This expansion card uses the PCI-Express bus for a fast and stable connection, supporting the ultra-high-speed 5Gbps transfer rate. It comes with an external power connector for added stability with power-hungry devices. Perfect for connecting external hard drives, card readers, printers, and more, it's a straightforward upgrade to expand your PC's connectivity. Specifications: Product Name: PCI-E to 2-Port USB 3.0 Expansion Card Interface: PCI-Express (Compatible with x1, x4, x8, x16 slots) USB Standard: USB 3.0 (Rev. 1.0), Backward compatible with USB 2.0/1.1 Data Rate: Up to 5Gbps Supported Systems: for Windows XP/Vista/7/8/10, for Linux, for DOS, for Server 2003/2008 Color: Black Material: PCB Package Contents: 2 x Expansion Card Note: Package includes only the listed contents. Slight color variations may occur due to monitor settings. Allowable size measurement error is +/- 1-3cm.