PCI-E Express X1 to Dual PCI Riser Extend Adapter Card With USB 3.0 Cable Feature: By PCIE slot expansion of two PCI slots Suitable PCIE × 1 × 4 × 8 × 16 It supports two PCI32 bit 33MHz bus Powered by SATA link Conform PCI express 1.0 specification Conform PCI 2.3 specification Voltage 5V or 3.3V (adjustable) Specification: Product Interface: Motherboard-side PCI-E 1X (1X, 4X, 8X, 16X compatible) Product rate: PCIE1.0 Voltage 5V or 3.3V (adjustable) Support System:Windows 2000 / XP / Vista / Win7 / Win8 PCB Color: Blue USB cable length：0.62m/24inch Package Included: 1PC*PCI-E Card 1PC*PCI card 1PC*USB cable Note: The above parameters are for reference only, all in kind shall prevail PCI card Do not insert anti, anti-insert can easily lead to burn out Due to manual measurement, please allow 1-3mm error. Please make sure you don't mind before ordering. Please allow 1-3 grams weight error. Please make sure you don't mind before ordering. Due to different lighting of photos and differences in monitors, the pictures may not reflect the actual color of the object. Please make sure you don't mind before ordering, thanks!