Plug the RailPro(TM) CI-1 Computer Interface USB module into a PC to add RailPro Direct Radio + NET to your railroad. The interface allows you to control and set up RailPro locomotive modules. Use a CI-1 to set up a locomotive with a RailPro LM-3S for use on DCC layouts controlled by standard DCC systems. Use RailPro PC software with an easy-to-use graphical interface to set up your DCC loco without any CV programming. A loco equipped with a RailPro module is dual mode meaning it can be controlled with standard DCC controllers or with RailPro radio control by using a HC-2 or the CI-1. You can also use a CI-1 computer interface and a PC to get started with RailPro for a lower cost, and buy a RailPro handheld controller later.