Athearn Genesis F units now come with factory installed onboard sound and DCC decoder! ? Individual sound boards installed in both the A-unit and B-Unit. ? Sound units are compatible with both DCC and DC operations. ? In DC mode, you can program an MU lashup with lead unit only horn, bell and lights. ? In DC mode, all sound features are operated by a wireless handheld remote and NO additional control box is required to operate advanced sounds in DC operation. ? Six-button remote control allows control in the DC mode of the horn, bell, coupler crash, break squeal, dynamic brake and brake air release. ? Additional DC mode programmable features allow for different bell and horn tones, coupler on/off, bell rate, directional lights on/off and volume control. In DCC mode, all functions are NMRA compatible. Researched from the prototype to match specific units ? Genesis improved drive line ? Dynamically Balanced five pole skew wound motor and flywheels ? All windows glazed ? Body matches exact model and phase for prototype ? Directional constant lighting ? Separately applied photo etched metal and injection molded detail parts ? Cab interior