The PEXUSB4DP is a low profile 4 port USB card designed for versatility and performance.Providing simple system expansion for added peripheral connections, this PCI Express USB card adds 3 external USB 2.0 slots and 1 internal USB 2.0 slot, with support for high speed USB 2.0 data transfer rates of up to 480 Mbps, and includes WHQL certified drivers and easy plug and play installation.Capable of adapting to virtually any PC case form factor, the low profile USB card includes a standard profile bracket for installation in full form factor cases.