Port Replicator for Toughbook 52The Desktop Port Replicator plugs into the back of your notebook computer and contains common PC ports such as serial and USB ports. The purpose is to enable you to easily attach your portable computer to non-portable devices like printers or monitors. For example, if you used your notebook computer in your car as well as your office, you would simply plug your computer into the port replicator in either location and be ready to work without the hassle of dealing with cords.