Newly upgraded for 2003, these models feature a lower body height for prototypical appearance; etched-metal fan housing grille; painted smoke unit cover; no traction tires for more reliable operations; new modular PC board with plug-and-play capabilities; plug-in for battery operation; new patented super smoke unit with burnout protection; factory-installed speaker for optional after-market sound unit (sold separately); aluminum colored trim around windows and extra weight for improved performance. This DCC and radio control ready model also includes powerful motor blocks; blackened metal wheels; operating marker and headlights and AAR knuckle couplers; interior cab lighting and full cab interior details; detailed sideframes with springs; blackened or painted handrails and grab irons; and realistic lettering and numbering.