Model: The locomotive frame and body are constructed of metal. The locomotive has a built-in digital decoder and sound generator for operation with DCC, Selectrix, and Selectrix 2. It also has a motor with a flywheel. 4 axles powered. Traction tires. Warm white LEDs are used for the headlights. They and the marker lights change over with the direction of travel. All of these lights and the locomotive's cab lighting can be controlled digitally. The locomotive has NEM coupler pockets. Length over the buffers 119 mm / 4-11/16".