Model: Both locomotives have digital decoders. They also have controlled high-efficiency propulsion. 3 axles powered. Traction tires. Both locomotives have articulated frames for better negotiation of curves. They also have separately applied grab irons. The headlights change over with the direction of travel, will work in conventional operation, and can be controlled digitally. The headlights are maintenance-free LEDs. Both locomotives come individually packaged and marked. There is also a master package. Length over the buffers for each locomotive 21.0 cm / 8-1/4".