The Evolution Series is GE's latest locomotive platform. InterMountain Railway is faithfully reproducing the prototype in HO scale. This is a NEW MODEL. Each locomotive will be factory ready to run on DC or DCC with optional SoundTraxx® Tsunami® Sound. The model features include: prototype specific details to match the cab, the trucks, the rear lights, etc., particular to each road name; operating number board lights and ditchlights; etched metal details; wire grab irons; laser sharp paint and lettering; and Kadee® couplers. Sound models will have a factory installed SoundTraxx® Tsunami® DCC decoder. Stock Number / Locomotive Number -01 7661 -02 7682 -03 7724 -04 7737