This engine has bin run and checked out and all the sounds work. The features are 2 precision flywheel equipped motors, operating proto smoke system, all metal wheels and gears, compatible with most AC transformers, proto sound electronic reverse unit, die-cast 4 wheel trucks, weights almost 6 LBS, intricately detailed body, directional controlled headlight, die-cast trucks, pilot & fuel tank, lighted cab interior, cab engineer figure, operates on 0-31 track, includes proto sound digital sound with squeaking breaks & passenger station sounds by QSI.