Broadway Limited Imports -- 4-6-6-4 Challenger Late, Smoke Lifters, Oil Tender, Sound, DCC, Smoke - Paragon 3 -- Union Pacific 3976 (2-Tone Gray) -- This 4-6-6-4 Challenger features full Paragon3 sound and DCC for realistic sound and motor control. The Paragon3 sound system works with all Broadway Limited Rolling Thunder(TM) advanced sound systems. Other features of this steam locomotive include a heavy die cast chassis, smooth-running flywheel-equipped drive, directional lighting, synchronized smoke and magnetic knuckle couplers. This HO Scale 4-6-6-4 Challenger locomotive can be operated on all DCC systems as well as on standard DC railroads (with limited sound functionality). This model has wheels profiled to operate on Code 70 and larger rail and curves of 18" radius or larger are recommended. The 4-6-6-4 Challenger comes with roadnumber and era-appropriate details, smoke lifters, coal or oil tender and other details as appropriate.