Tested working lately used great condition The Athearn Genesis HO ATHG40707 Norfolk Southern GP50 #7090 UPGRADED with Digitrax Sound is a highly detailed model train locomotive in HO gauge. This locomotive features the Norfolk Southern corporate roadname and is upgraded with Digitrax sound technology for a realistic and immersive train experience. Perfect for model railroading enthusiasts looking to add a high-quality and authentic piece to their collection.