Feature:1. Fast transmission speed. USB 3.0 transmission rate can up to 5Gbps.2. Dual USB 3.0 interface satisfy your transmission needs.3. Adopted high-quality electronic components, low impedance, high stability, high temperature resistance.4. Adopted high-quality VL805 chip.5. Large 4P power supply, stable power supply, guarantee transmission security.Specification:This expansion card can adapt standard PCI-E interface into 2 port USB3.0 interface, fast transmission speed and dual USB3.0 interface can satisfy your transmission needs.Features:Fast transmission speed. USB 3.0 transmission rate can up to 5Gbps.Dual USB 3.0 interface satisfy your transmission needs.Adopted high-quality electronic components, low impedance, high stability, high-temperature resistance.Adopted high-quality VL805 chip.Large 4P power supply, stable power supply, guarantee transmission security.Specifications:Compatible Slots: PCI-E x1 / x4 / x8 / x16 (not compatible for PCI slot)Using Chip: VL805OS: Windows XP / Windows 7 / Windows8 / Windows8.1 / Windows10 / Vista Item Weight: 40g / 1.41ozPackage Weight: 40g / 1.41ozItem Size: 6.7 * 6.5 * 0.4cm / 2.64 * 2.56 * 0.16inL * W * HPackage Size: 6.7 * 6.5 * 0.4cm / 2.64 * 2.56 * 0.16inL * W * HPackage List:1 * PCI-E to USB 3.0 Expansion Card1 * CD Drive Package List:1 * PCI-E to USB 3.0 Expansion Card1 * CD Drive