Features
•  PCI Express Base Specification Revision 2.0 dual-lane (x2)
•  Compliant with Universal Serial Bus 3.1 specification Gen2
•  Compliant with USB Attached SCSI Protocol Revision 1.0
•  Compliant with xHCI (eXtensible Host Controller Interface) specifications Revision 1.1
•  Supports simultaneous operation of multiple USB 3.1, 3.0, USB 2.0 and USB 1.1 devices
•  Supports USB data transfer rate of 10G/5G/480M/12M/1.5M bps
•  Expands dual external USB3.1 Super-Speed plus Type-A ports on the system
•  Each USB port supplies maximum +5VDC / 900mA power output to USB device
•  Built-in over current protection on each USB port
•  Support device remote wakeup function from USB keyboard or mouse
•  Support Control, Bulk, Stream, Interrupt, Isochronous transfer type
•  Operation Temperature ：0 to 60°C (32 to 140°F)
•  Storage Temperature：-20 to 70°C (-4 to 158°F)
•  Operation Humidity：5 to 95% RH

Package Contents
•  1 × PCI Express to 2 ports USB3.1 Host Controller Card
•  1 × User Manual
•  1 × Driver CD
•  1 x Low Profile Bracket

Note:To Satisfy USB3.1 10 Gb/s SupperSpeed+highest performance,this adapters the PCEe Gen2/x2(10Gb/s) interface connector design.User has to plug this card add-on card into PCIe x16(or x4 above) slot on the mainboard,such as graphics add-on card adopting.Due to expansion slot mechanical limitation,this card can NOT be plugged  into PCEe x1 slot.If  user does not have avaliable PCEe x16 on the mainboard,pls pick up this adopts PCIe Gen3/x1(8Gb/s)interface connector design.
System Requirements:
• Windows 7 (X86/X64) 
• Windows 8.x / 10 (X86/X64) (Windows in-box driver)
• Support Linux 2.6.31 or later (Linux OS already implemented USB3.0 driver)