ITEM NAME:2 Port Usb 3.0 Pci-E Expansion Card External Usb3.0 Pcie Card Adapter With O2J3 2 Port Usb 3.0 Pci-E Expansion Card External Usb3.0 Pcie Card Adapter With O2J3 Type:two interfaces USB3.0 expansion card Chipset:VLI VL805 Interface:PCI-E X 1 Compatible PCI slot:X1-X4/x8/x16 USB interface:2 X USB3.0 Transfer Rate: 5 Gb/s USB3.0 Applicable models:conventional desktop Support system:Windows XP32/64 Windows 7(32/64)windows8/8.1 windows10 Using VLI VL805 master chip, high speed operation core, high compatibility The card comes with 2A power supply and do not need external power supply, 330 12X12mm inductor is better than 100 10X10mm one. Each interface equips with independent interface protection fuse, and immediately cut off the power while external USB short circuit or overcurrent happens, protect external divices and computer from damage, automatically return to normal after troubleshooting Each interface equips with independent regulated capacitor, guarantee smooth power supply without interface, also can undertake 250Â ° celsius with Solid chip capacitor, strong endurance With immersion gold process, good electrical conductivity, strong antioxidant capacity, it can guarantee stable transmission Net weight: 58g Colour:black Material:Plastic + metal Size:12*7.7*1.9cm Package Contents: 1* expansion card 1* drive CD 1* screws.Type:two interfaces USB3.0 expansion card. USB interface:2 X USB3.0. Transfer Rate: 5 Gb/s USB3.0. Compatible PCI slot:X1-X4/x8/x16. Interface:PCI-E X 1. Using VLI VL805 master chip, high speed operation core, high compatibility.