Belkin Gigabit Ethernet ExpressCard with 1 External Port (F5U250) Adds a port that processes 1000% faster than 10/100 Ethernet Adds a Gigabit Ethernet port directly to your notebook computer Installs easily into any 34mm or 54mm wide ExpressCard slot Future-proofs your notebook computer for tomorrow's bandwidth-intensive applications The perfect solution for adding a Gigabit Ethernet port to a notebook computer