HO GEN SD90MAC Locomotive with DCC and Sound UP #3678 (ATHG-1931)

HO Scale Genesis EMD SD90MAC Diesel Locomotive with DCC and Sound in Union Pacific livery, UP 3678. This high‑detail model captures the prototype’s presence with a heavy die‑cast frame, full cab interior, and numerous separately applied details on the body and underframe. A built‑in DCC decoder drives SoundTrax Tsunami2 sound through dual speakers, delivering realistic engine, horn, and bell effects, with full NMRA‑compatible functions and operation on both DC and DCC layouts.

Road-number specific features reflect UP 3678, including nose-door variations and patch numbers, front ditch lights, and optional road-name details. The model ships fully assembled and ready to run, featuring all‑wheel drive for smooth, quiet operation, RP25 wheel contours for compatibility with popular HO track, and LED lighting for a lifelike appearance. It’s designed to perform on a range of HO layouts, with a heavy frame for pulling power and the option to add grime using Primed for Grime finishes to recreate an in‑service look.