The HO Lionel 6-58007 Union Pacific 4-6-6-4 Challenger Steam #3984 is a brand new model train steam locomotive replica. It features a Dual - Analog & Digital control system with a DCC Dual Mode Decoder installed, allowing for smooth operation on both DC and DCC rail systems. Made of diecast material and designed with back-head detail, this HO scale locomotive also has a sound system that has been tested and is in working order. With its original box and paperwork included, this model is a perfect addition to any model railroads and trains collection for enthusiasts of transportation-themed trains.