Model: The locomotive comes with a digital decoder, controlled high-efficiency propulsion, and a sound effects circuit. 2 axles powered. 4 traction tires. The headlights / marker lights will work in conventional operation and can be controlled digitally. The sound effect of a whistle as well as the acceleration and braking delay can be controlled digitally with the 6021 Control Unit. Different design pantographs. Separately applied grab irons. Length over the buffers 20.4 cm / 8-1/16".