Supports USB 2.0 based ExpressCard/34 & /54 cards only Compatible with USB 2.0 specifications Supports data rates up to 480 Mbps Plug and Play installation, no driver required PC and Mac Compatible Important note: This is a USB 2.0 based ExpressCard Adapter, PCI Express based cards,such as FireWire cards, are not supported. The LINDY USB to ExpressCard adapter allows you to use ExpressCards with your USB enabled computer. Perfect for desktop computers or older laptops.