ITEM NAME:2-Port USB 3.0 PCI-Express PCIe Adapter Controller Card Low Profile 4-Pin Power Description Descriptions: *2-port USB 3.0 PCI-Express PCIe adapter controller card. *Includes low profile bracket for small form factor computers. *Backwards compatible with USB 2.0 devices. *Support simultaneous operation of multiple USB 3.0 and USB 2.0 devices. *Supports 2 downstream ports for all speeds. *Support Windows 7/Vista/XP 32/64-bit, Server 2003-2008 32/64-bit. *Bus-.Includes low profile bracket for small form factor computers. Support simultaneous operation of multiple USB 3.0 and USB 2.0 devices. Output: 5V/900mA MAX (each USB port). 1 Low Profile Bracket.