Tank Locomotive. Gauge: H0. Era: III. Prototype: German Federal Railroad (DB) class 81 heavy switch engine. Model: The locomotive has a digital decoder. 4 axles powered. Traction tires. The locomotive has Relex couplers in NEM pockets. The triple headlights change over with the direction of travel, will work in conventional operation, and can be controlled digitally. Length over the buffers 12.8 cm / 5".