Surpasses any on the market in quality and performance, 100% Guaranteed!! This ExpressCard benefits you with 2 FireWire800 slots (2x - 9Pin) connectors. You can use different cables to match your particular FireWire peripherals depending on what you need. With the FireWire 800 protocol you can get transfer rates of 100, 200, 400, and 800 Mbps. Also for the best ROI, the 54mm Express Card slot is compatible so the 34mm will work in a 54mm slot but not vise-versa.