Internal host interface: pcie output interface: usb 3.2 Gen 1 3.1 Gen 1 purpose: pc red the pexusb3s22 2-port pci express superspeed usb 3.0 Card with sata power lets you add 2 usb 3.0 Ports to any pci express-enabled computer system. With superspeed usb 3.0, You can reach data transfer speeds up to 5 gbps, while still being backward compatible with existing usb 2.0 Devices at 480mbps.With a built-in sata power connector, each usb port can deliver up to 900ma of power to usb 3.0 Devices 500ma for usb 2.0 , By connecting to your computer power supply. Compatible with both low profile half-height or full profile computer cases, this pcie usb 3.0 Card is backed by a startech.Com 2-year warranty and free lifetime technical support.The startech.Com advantage- superspeed usb 3.0 Connectivity at up to 5 gbps and 80% more power than usb 2.0- Dual profile design to fit into full or low profile small form factor sff systems- uses a sata power connector for compatibility with newer systems that have limited or no lp4 power supply connections, to ensure maximum power for usb devicesfeatures- provides two external usb 3.0 Connections- fully compliant with usb 3.0 Revision 1.0 Specifications and intel xhci rev0.95 Specifications, with transfer rates up to 5 gbps- built-in sata power connector for high-powered usb devices, suitable for systems with limited or no lp4 power supply connections- provides up to 900ma per usb port- backward compatible with usb 2.0 And usb 1.0 1.1 Devices- sup...