Features: DCC/Sound version available with LokSound decoder Analog version includes an 8-pin socket for DCC New! Improved tooling on turbo exhaust stack. Also includes option of water cooled or air cooled turbo exahust stack Separately-applied handrails and stanchions, including separate drop step detail Factory installed AccuMate® couplers Dual flywheel-equipped five-pole skewed armature motor for optimum performance at all speeds Metal grab irons Accurate painting and printing New Sound Features for Gold Series: DCC Operation Supports all DCC-programming modes Flexible mapping of function keys F0 to F28. A total of six DCC function outputs are available Follows all NMRA DCC standards and recommended practices. Analog (DC) Operation The LokSound Select Dual-Mode decoder allows your Atlas Gold Series locomotive to be used on DC as well as on DCC layouts. Please note that the Atlas Quantum Engineer will NOT operate an Atlas Gold Series locomotive equipped with a LokSound Select decoder on an analog (DC) layout. However, the sound and lighting functions of the LokSound Select decoder in the Atlas Gold Series RS-3 locomotive can be controlled by an easy-to-use basic DCC system Also note that on a DC-powered layout, a DCC and sound equipped locomotive (such as the Atlas Gold Series RS-3) CANNOT be consisted with another locomotive that does not also have both DCC and sound. (This statement does NOT apply to DCC-equipped locomotives operating on a DCC layout.) Sound Functionality 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 and Automatic Notching modes with the ability to change modes ”on the fly” are provided for true realism.