Features: Flat or step pilots used where appropriate Long hood with or without dynamic brake used where appropriate 3,100 or 2,400 gallon fuel tank used when appropriate per road name Separately-applied coupler cut levers Painted safety rails Dual flywheels Directional lighting Blackened metal wheels Factory installed AccuMate magnetic couplers SILVER SOUND READY FEATURES (SILVER LOCOMOTIVES ONLY): Sound ready & equipped with speaker for easy conversion to DCC sound. NMRA 21-pin plug for DCC (Decoder-ready) DCC OPERATION FEATURES (GOLD LOCOMOTIVES ONLY): Supports all DCC-programming modes; DCC includes RailCom and RailComPlus, with 14, 28 or 128 speed steps and with 2-digit and 4-digit addressing. Flexible mapping of function keys F0 to F28. A total of 6 DCC function outputs are available, and all can be function mapped (disable, brightness, light effects) individually Follows all NMRA DCC standards and recommended practices. SOUND FUNCTIONALITY FEATURES (GOLD LOCOMOTIVES ONLY): Over 20 sound effects are available, including engine start-up and shutdown, prime mover sounds through all eight notches, bell, air horn, air compressor, dynamic brakes and more. There are up to 16 user-selectable horns, 2 user-selectable bells, and 2 user-selectable synchronized brake squeals. Equipped with ESUs Exclusive Full Throttle features for ultimate realism in prototype running. AccuMate couplers are made under license from AccuRail, Inc. ***Silver Sound Ready Atlas Silver Sound Ready models are equipped with a speaker for easy conversion to sound with the addition of a decoder.