• Smooth tracking Free rolling Contoured Insulated Axles

Units without an interface can be converted using the interface circuit board included with this decoder

Block transponding receivers

This is the ideal connecting wire for model trains

MTH 80-3159-1 Union Pacific HO Scale 4-6-6-4 Gray Challenger #3983 FitmentDiagramsCount_1 • Smooth tracking Free rollingWhile this is not the first HO model of this massive prototype, we believe it is among the best, equipped with authentic articulated sounds, including the front and rear engines going in and out of sync; actual UP whistle sounds, which can be quilled, just as a real engineer plays the whistle control; diecast construction and optional traction tires for pulling power to match the prototype; slow speed capability down to a steady 3 scale miles per