ITEM NAME:PCI-E to USB 3.0 2 Ports Controller Adapter Card Supports PCI-E 1X/4X/8X/16X Description: - Dual USB interface design, support multiple devices to simultaneously transmit data. - When you need to run large files, connect the big 4PIN interface to make it run fast. - 20PIN(19 pin) expansion interface, add USB3.0 front panel can increase USB3.0 interface. - USB3.0 transmission speed reaches 5Gbps, compatible with USB2.0/1.1. - Suitable for models: desktop computer (supports PCI-E 1X 4X 8X 16X). Package Included: 1 Piece Adapter Card 1 Piece Screw 1 Piece CD.Suitable for models: desktop computer (supports PCI-E 1X 4X 8X 16X). - Dual USB interface design, support multiple devices to simultaneously transmit data. 1 Piece Adapter Card. 1 Piece CD. 1 Piece Screw.