4-port USB interface expansion configuration 4-port usb3 0 is downward compatible with USB20 and usb1 1. Support the hot plug function of USB devicesThickened gold-plated finger and motherboard USB slot connection ensures data transmission integrity and stable operationNo self power supply plug and play, with four power supply capacitors, no external power supply portPCI-E X1 interface can be easily expanded, plug and play, convenient and fast as long as the motherboard has PCI Express X1 / 4 / X8 / x16 slots.The high-performance main control chip is a fully intelligent chip. The core chip uses hardware architecture to work independently, does not occupy computer CPU resources, and has low power consumption. It can easily process some big data and big video signals.Product name: PCIE to 4-port USB30 expansion cardNumber of interfaces: USB3.0*4Applicable slot: PCI-EX1/X4/8/X16Bus bandwidth: about 5Gb/sProduct size: 120MMX96MMx83MMWorking environment: 0Celsius-70CelsiusApplicable system: Windows XP/Win7/win8/win8.1/Win10, etc.Colour:blackMaterial:PCBPackage Contents:1 x Expansion CardOnly the above package content, other products are not included.Note: Light shooting 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 ! !