This Walthers Mainline ALCO PA UP 604 Union Pacific 910-20077 featuring Soundtraxx Tsunami DCC and Sound.  This locomotive is a great addition to any model train collection. With its detailed design and realistic features, this HO gauge locomotive is sure to impress. It is a replica of the City of Los Angeles Streamliner locomotive and features the iconic Union Pacific Railroad corporate roadname. The locomotive is made of plastic and metal materials and has a wheel configuration of A1A - A1A. It also includes DCC and Sound features, making it a dynamic and exciting addition to any model train setup. Whether you are a seasoned collector or just starting out, this Walthers Mainline locomotive is a must-have.