The Walthers 920-40709 EMD F7A/B- Alaska Railroad #1508 F7A & #1503 F7B Tsunami Sound & DCC is a ready-to-go pre-built model replica of the EMD F7 locomotive in Alaska Railroad colors. This 1:87 scale locomotive features a Bo-Bo wheel configuration and digital control system, making it suitable for hobbyists aged 17 years and up. The multicolor design and inclusion of DCC fitment add to the realism and functionality of this HO gauge model train, perfect for transportation-themed layouts. Made of plastic and featuring a two-rail system, this locomotive from Walthers is a high-quality addition to any model railroad collection.