Specification:Item: Expansion CardModel: U3N04S-BGChip: NEC720201Bus Type: PCI-ECompatibility: For large and small PC casePort: 4 * USB 3.0System Supported: For Windows XP/Vista/Win 7, Win 8, Win 10 OSSlots: PCI-E 1x/4x/8x/16x slotsItem Size: 12 * 7.5cm / 4.7 * 3inchItem weight: 50g / 1.8ozPackage Size: 14.5 * 12.7 * 2.5cm / 5.7 * 5 * 1inchPackage weight: 104g / 3.7ozCompliant with: PCI Express Revision 2.0, Universal Serial Bus USB 3.0 Revision 1.0, compatible for USB2.0 and PCI-Express 1.0. Features:USB 3.0 PortFour standard USB 3.0 ports, ensure fast transfer rate up to 5Gbps.High quality main control chipDelivers low heat, fast speed and stable operation, to eliminate interference to the greatest extent.Interface Protection & Solid Capacitor Each interface is equipped with independent interface protection to allow power dump in the case of short circuit and over-current of USB device, to protect the computer from being damaged, and automatically restore when faults remove and with an independent solid capacitor to ensure stable power supply to each interface, with high temperature resistance.With power supply moduleProvides 2A power supply, no external power supply required.Stable PerformancePCB plate ensures high stability of electrical performance.Comes with a 2U Low-profile bracketLow-profile bracket provides the option for installation in small size HTPC case.Gold finger Features good conductivity and strong oxidation resistance, to ensure more stable transmission.