Welcome to our store! 4 Ports: Upgrade your desktop to 4 USB 2.0 ports via a PCI Express x1 slot. Solves the issue of limited USB ports inside the computer, allowing connection of more USB data devices. Features a large 4-pin power supply. Transmission Speed: PCI E to USB expansion card complies with USB 2.0 specification and OHCI protocol, supporting low speed (1.5Mbps)/full speed (12Mbps) and EHCI protocol, high speed (480Mbps). Wide Compatibility: Internal USB hub is compatible with Windows 7/8/10/, Linux, and OS X operating systems. Suitable for PCI Express x1 to x16 slots (no driver required for systems above Windows XP). Supports Hot Swapping: 4-port PCI E to USB hub is plug and play, supporting hot swapping for easy use. Broad Application: The USB expansion card adapter can be used with various USB devices on the market, such as printers, card readers, cameras, scanners, etc. Item Type: PCI E to USB Expansion Card Hub Product Material: PCB Interface: 4 x USB2.0 Applicable Slot: PCI E Main Chip: ASIX MCS9990 Function: Complies with PCI Express specification version 1.1, bus bandwidth 2.5Gbps Complies with USB specification version 2.0 Complies with USB EHCI interface protocol version 1.0A Complies with USB EHCI interface protocol version 1.0 External power connector provides more power to the USB bus 1 x PCI E to USB Expansion Card Hub 1 x Metal Bracket 1 x Screw