The D Link DU 520 internal adapter card is a 5 port USB 2.0 PCI adapter. Each USB port can transfer data up to 480 Mbps. At 40 times faster than the previous USB 1.1 specification, USB 2.0 provides the speed and bandwidth for all of your USB 2.0 needs. And because it is backwards compliant with USB 1.1, you can use all of your USB devices as well as new USB 2.0 products.The DU 520 provides five type 39A39 downstream ports for connecting USB peripherals and USB hubs. Configured directly by the operating system, the DU 520 operates in accordance with EHCI specification and compliant with PCI version 2.2. Attach Any USB Devices to Your PC.39