With improved body tooling, new sill-mounted handrails, Flexicoil trucks and many other details, our next run of WalthersProto(R) EMD SW1200s will be perfect power for your HO railroad. Limited edition - one time run of these roadnumbers Based on units in service 1954 to present Flexicoil or AAR Type A sideframes with plain or roller bearings as appropriate Sill- or hood-mounted handrails as appropriate Available with ESU LokSound 5 sound for DCC and DC layouts Road-specific details 5-pole, skew-wound, high-torque, high-efficiency can motor Helical gears with 14:1 ratio for smooth, ultra-quiet running LED constant and directional headlights Heavy die-cast metal underframe Proto MAX(TM) metal knuckle couplers For more information see the ESU Full Throttle Quick Start Guide available here.