The MTH GP-9 O Gauge 3-Rail Digital Diesel Milwaukee Road #276 20-2702-1 is a highly detailed replica of a GP-9 diesel locomotive in O gauge scale. This pre-built model features a digital control system, smoke unit, light function, and sound function for a realistic train experience. Made of plastic and diecast materials in orange and black colors, this ready-to-go locomotive is perfect for model railroading enthusiasts aged 8 years and up. With its bo-bo wheel configuration and three-rail system compatibility, this Milwaukee Road locomotive is sure to enhance any transportation-themed train layout.