Features: 
High quality and 100% brand new 
Extend with 2 USB 3.0 downstream ports and 1 USB3.0 19-pin Connector(can expand another two USB 3.0 ports) for standard desktop PC. 
Fully compliant with one-lane (x1) PCI Express 2.0 specification. 
TWO external 5Gbps SuperSpeed USB 3.0 ports. 
One 19-pin internal 5Gbps SuperSpeed USB 3.0 port. 
Built-in with 15-pin SATA Power Connector for added power source to better support power hungry bus-powered devices. 
SuperSpeed USB 3.0 offers 10 times performance increase over Hi-Speed USB 2.0. 
USB 3.0 complies with Intel eXtensible Host Controller Interface (xHCI). 
Up to 5Gbps maximum transfer rate. 
SuperSpeed USB 3.0 is backwards compatible with USB 1.0/1.1/2.0 devices (data transfer rate at 1.5/12/480Mbps). 
Supports PCI Low profile. 
Ideal connection for digital cameras, scanners, printers, external CD/DVD/Blu-Ra