The Athearn HO ATH65138 Southern Pacific SD45 8650 with Sound is a highly detailed model of a diesel locomotive in HO gauge. This locomotive is designed to replicate the Southern Pacific corporate roadname, making it a great addition to any model railroad collection. With the added feature of sound, model train enthusiasts can enjoy a more immersive and realistic experience as they run this locomotive along their tracks. The Athearn brand is known for producing high-quality model trains, making this a reliable and accurate representation of the Southern Pacific SD45 8650.