The ThinkPad Port Replicator II provides easy cable management. Connect and disconnect to your desktop peripherals in a single step rather than one-by-one. It offers pass-through connection for Gigabit Ethernet, USB 2.0, and DVI, as well as standard ThinkPad notebook ports. The Port Replicator II helps you maintain the mobility afforded by your ThinkPad system while allowing quick and easy access to desktop accessories at home or in the office. The integrated system tray provides a stable fit and helps to lock-in your ThinkPad notebook when an optional cable lock is used in on the Port Replicator II. It requires power either from the ThinkPad AC Adapter that ships with the ThinkPad system or an optional adapter.