USB3. 0 high speed transmission enjoy the rapid world and improve the transmission rate (you must add power to use).Two port expansion play with external devices. No matter how many external devices such as keyboard, mouse, printer and cooling fan are, they can play at the same time without connection trouble.The thickened gold-plated finger has the advantages of oxidation resistance, corrosion resistance, wear resistance and good stability. Ensuring good contact can effectively reduce packet loss and improve data transmission rate.The solid-state capacitor adopts safe and stable solid-state capacitor to reduce ESR, with excellent conductivity, no sudden heat and long service life.The large 4p-n port is powered by dint, and the four ports operate freely under full load, so that the expansion interfaces do not affect each other, and can meet the usb30 power supply standard.Interface: USB3.0Colour: blackMaterial: PCBPackage Contents:1 * Expansion Card1 * Power CordOnly 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 ! ! !