Features: Pilots with and without anti-climber Cab headlights or low-nose headlights Cab with 4 or 2 side windows Bell mounted under the sill or on the long hood FB-2, AAR type B, or Blomberg truck side-frames as appropriate Separately-applied scale detail parts See through step detail on sill Etched metal radiator grilles Painted crew members Factory-equipped with AccuMate knuckle couplers Coupler pocket designed to accept AccuMate Proto-couplers Five-pole skewed armature motor with dual flywheels Directional lighting Silver Sound Ready Atlas Silver Sound Ready models are equipped with a speaker for easy conversion to sound with the addition of a decoder. Atlas Master Series Gold Additional Features: Supports all DCC-programming modes Flexible mapping of function keys F0 to F31 . Follows all NMRA DCC standards and recommended practices. ESU LokSound Functionality Features: 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 16 user-selectable horns, 2 user-selectable bells, and 2 user-selectable synchronized brake squeals. Manual & Automatic Notching modes with the ability to change modes on the fly are provided for true realism. ***Silver Sound Ready Atlas Silver Sound Ready models are equipped with a speaker for easy conversion to sound with the addition of a decoder.