The StarTech PEXUSB312C2 is a dual port USB-C expansion card that also includes SATA connectivity. This expansion card is designed to provide additional USB 3.1 ports to your computer, allowing for high-speed data transfer and device connectivity. It is compatible with the SKU220645 model, making it a versatile accessory for enhancing the connectivity options of your computer system. Ideal for those looking to expand their computer's capabilities for data transfer and device connectivity.