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.