The Asus U3S6-2x USB 3.0 Port 2x SATA 6Gbs PCIe x4 expansion card is a high-quality plug-in card that adds two USB 3.0 ports and two SATA 6Gbs ports to your computer. With compatibility for various interfaces such as PCI Express x4, USB 3.0, and USB 2.0, this expansion card from ASUS is ideal for enhancing the connectivity and performance of your system. Made in China, this unit offers a maximum data rate of 6Gbs, making it a reliable choice for expanding your computer's capabilities.