MTH 30-21243-1: 

Union Pacific O Gauge RailKing ES44AC Imperial Diesel Engine With Proto-Sound 3.0

• Intricately Detailed, Durable ABS Body
• Die-Cast Truck Sides, Pilots and Fuel Tank
• Metal Chassis
• Metal Handrails and Horn
• Detachable Snow Plow
• (2) Handpainted Engineer Cab Figures
• Authentic Paint Scheme
• Metal Wheels, Axles and Gears
• (2) Remote-Controlled Proto-Couplers
• Prototypical Rule 17 Lighting
• Directionally Controlled Constant Voltage LED Headlights
• Lighted LED Cab Interior Light
• Illuminated LED Number Boards
• Operating LED Ditch Lights
• Operating LED Charging Lights
• (2) Precision Flywheel-Equipped Motors
• Operating ProtoSmoke Diesel Exhaust
• Onboard DCC/DCS Decoder
• Locomotive Speed Control In Scale MPH Increments
• Proto-Sound 3.0 With The Digital Command System Featuring Freight Yard Proto-Effects
• Unit Measures: 17” x 2 1/2” x 3 3/4”
• Operates On O-31 Curves