Each interface of the port protection design product is equipped with independent protection insurance. When the external USB device is short circuited and the current is too large, the power supply can be cut off instantly, so as to protect the equipment and computer from damage. After troubleshooting, it will automatically return to normal. Each interface is equipped with independent voltage stabilizing capacitor, which can ensure the stable power supply of each interfaceMulti system compatible with Windows XP, vista, 7 (need to install driver) windows 8,10 system comes with driverProduct power supply design the product has its own power supply module design, which can be used normally without external power supply. At the same time, sata15pin power supply interface is also designed. If more current power supply is required, sata15pin power supply can be connected externally PCI-E X1 gold finger high gold plating: strong oxidation resistance, good conductivity and wear resistance.USB3. 0 port 4 port standard usb3 0 interface design Product Name: 4 ports usb3 0 expansion cardModel: ph64Input interface: PCI-E X1 compatible with X4 / X8 / x16Compatible with usb1 1,USB2. 0 USB3. 0 USB3. 1; USB3. 2 5G;Comply with PCI Express 3.0 basic specificationCompliant with the extensible host controller interface (xhci) specificationRevision: 1.0Speed: 5GbpsNumber of interfaces: usb3 0*4Supported chassis: both large and small chassis are supportedColour:blackMaterial:PCBSize:15 x 10 x 3CMPackage Contents:1 x Adapter cardOnly the above package content, other products are not included.Note: Light 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.

Note:Shipping time is 5-12 days