Specifications: Fully compliant with PCI Express Base Specification Rev 2.0. Single lane (x 1) PCI Express throughput rate is 5Gbps. Compliant with Universal Serial Bus 3.0 Specification Rev. 1.0. Supports multiple USB3.0, USB2.0 and USB1.1 devices running simultaneously. Supports the following data transmission rates: low speed (1.5Mbps)/full speed (12Mbps)/high speed transmission (480Mbps)/ultra high speed (5Gbps). Compliant with for Intel& 39;s Extensible Host Controller Interface (x HC) specification 0.96. 4 downstream ports supporting all speeds. Built-in 4-pin power connector for receiving power from additional power systems. Hot-swap feature lets you connect/disconnect devices without shutting down the system. Supports for Windows XP/vista/7 systems (32/64-bit system requirements for Windows XP/Vista/7 systems (32/64-bit). One available PCI Express slot (recommended PCI Express 2.0). Item Name: PCI-E Express Card Material: PC Interface: USB3.0 Size: 12cm x 6.7cm x 8cm/4.72" x 2.64" x 3.15" (Approx.) Notes: Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x PCI-E Express Card