ITEM NAME:USB 3.0 PCIe Expansion Card 4 Port PCI Card Adapter Extender 5Gbps Description: 4 USB 3.0 type A female connectors, compliant with USB 3.0 specification, backwards compatible with USB 2.0 & 1.1 specification, simultaneously enjoy the convenience of plug & play and hot swapping. Compliant with Single-Lane (x1) PCI-Express throughput up to 5Gbps. Supports 2.5Gbps PCI-E bus with full duplex channel. Suitable for all motherboard with PCI-e bus; with bus-.Interface: 4 Port USB 3.0. 1 Piece 4 Port USB 3.0 HUB PCI-e Adapter. Suitable for all motherboard with PCI-e bus; with bus-powered mode and no external power required for most of peripherals.