Maximize the availability of USB 2.0 ports for both external and internal USB 2.0/1.1/1.0 peripherals;Backed by a StarTech.com lifetime warranty and free lifetime technical support;4 external USB 2.0 ports and 3 internal USB 2.0 port/headers;High Speed USB 2.0 compliant, with support for data transfer rates up to 480Mbps;Backwards compatible with USB1.1/1.0 devices;Up to 500mA of power per port;Compliant with USB EHCI revision 0.95 and UHCI 1.1 specifications;Compliant with PCI revision 2.2 specification