Detailed Information About The Product:Item DescriptionExtend with 2 USB3.0 19pin connector (can expand 4 USB 3.0 ports) for standard desktop PC.SuperSpeed USB 3.0 is fully compatible with original USB system, peripherals and cables.Fully compliant with onelane (x1) PCI Express 2.0 specification.TWO external 5Gbps SuperSpeed USB 3.0 ports.One 19pin internal 5Gbps SuperSpeed USB 3.0 port.SuperSpeed USB 3.0 offers 10 times performance increase over HiSpeed 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 express Low profile.Fully PlugNPlay and Hot Swap compatible.No external power supply.System Support: Windows XP / Windows7/Windows8,Windows8.1,Windows10Fit PCI-E 1x,4x,8x,16x slot motherboardBoard Size:(L x W) 9.00 x 6.90cm/3.54 inch x 2.72 inch (Approx.)Colour: BlackMaterial: plastic + metalPackage Contents:1 x PCI Express Adapter Card1 x Low Profile BracketOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.About UsWe provide the good product with the best price,we support Wholesale/Drop Shipping Order1. For Drop Shipping order, please remark"dropshipping order", we will prioritize it.2. For Wholesale/Drop Shipping orders, if you have any ideas about the price or package,please contact us in advance,we will give you the best service to satisfy your demands.About Shipments1.We will send out the orders ASAP once your payment is completed normally.2.Please write your complete delivery address with correct phone number and zip code, especially please confirm your full name.About After-sale ServiceWe are reliable seller and we have our professional after-sale service for all of our customs. If there is any question about the order,please contact us in advance ,we will always here until you get a happy answer.About Feedback1. Please check the package and item when you get carefully to make sure there is no problem.2. If you have any problem or are not entirely satisfied with your package,please don’t be hesitate to contact us first before leaving negative feedback. We will resolve the problem to satisfy you.3. If there is no problem, please leave us five star positive feedback.Your affirmation is our greatest motivation ! !