Features: Etched metal grilles. Steam generator details on U28CG. Several cab, headlight and nose light variations to accurately match the prototype. Separately applied details parts. Factory equipped with metal knuckle couplers. DC and Sound versions available. Atlas Master Series Silver Additional Features: NMRA 21-pin plug for DCC (Decoder-ready) 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.