Model: The locomotive has controlled high-efficiency propulsion with an mfx decoder and a sound generator. 3 axles powered. 4 traction tires. The headlights change over with the direction of travel. They will work in conventional operation and can be controlled digitally. The diesel motor sounds, whistle, and acceleration and braking delay can be controlled digitally with a Control-Unit or Märklin Systems. Two additional sound functions, the sound of compressed air leaking and squealing brakes, can be controlled with Märklin Systems. Length over the buffers 20.5 cm / 8-1/16".