This PCI Express USB (Universal Serial Bus) 3.0 card offers a cost-effective upgrade that lets you add four USB (Universal Serial Bus) 3.0 ports to your computer through a PCIe slot. It offers two external ports plus two internal USB (Universal Serial Bus) 3.0 headers to help adapt your desktop or server to support a variety of USB (Universal Serial Bus) 3.0 devices. Flexible & convenient port design With extra motherboard-style USB (Universal Serial Bus) 3.0 headers you have the flexibility to add more internal USB (Universal Serial Bus) 3.0 devices to your PC. When your existing headers are occupied, you can connect front panel hubs or card readers using this versatile alternative to costly motherboard & computer upgrades. For added convenience, the card integrates two external USB (Universal Serial Bus) 3.0 ports, so you can plug in more devices such as external hard drives or printers. Simple installation & supports older devices The USB (Universal Serial Bus) 3.0 card is easy to install & requires no additional drivers or software in natively supported Windows 8.1 / 8 operating systems. Plus, it features a dual profile design that fits in standard or low-profile cases, so you can rest assured it will fit in your small form-factor system if needed. Connecting older peripherals isn't a problem either. So, there’s no need to purchase new devices since the adapter card is backward compatible with your USB (Universal Serial Bus) 2.0 & 1.x technology