This 4 Port ExpressCard USB 2. 0 Adapter Card adds four USB 2. 0 compliant ports to a host computer using an available ExpressCard slot, and is backward compatible with the USB 1. 1 specification, for use with older USB peripherals. The ExpressCard adapter can be installed in seconds, and offers combined hi-speed USB 2. 0 data transfer rates of up to 480Mbps - ensuring a reliable and efficient connection with MP3 players, digital cameras, external CD/DVD-ROM drives, or virtually any USB device you need to connect to your laptop computer. Designed to provide reliable USB connections, this ExpressCard adapter is backed by StarTech. com"s lifetime warranty and free lifetime technical support.