Desktop motherboards can use this product to transfer PCI-E to 4 USB3.0 high-speed data transmission ports, which are designed as rear 4 ports, which solves the problem of expanding external high-speed data transmission for users who do not have USB3.0 ports on the motherboard. The problem with the interface.Thick gold-plated gold fingersThicken the immersion gold technology, the transmission is more stable, and the full contact with the motherboard reduces the hardware failureUsing VIA VL805 main control chip, no power supply, faster transmission speed, more stable, and good compatibility.System requirements: support Windows Xp/Vista/7/8/10 32/64 operating systemHardware requirements: PCI-E 1X or PCI-E 16X interface oneModel: PCI-E to usb3.0 expansion card 4 portsType: Riser CardInterface: USB3.0Material:PCBcolour:BlackPackage Contents:1 x Adapter 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.