The class ET 85 car is a powered unit that includes a digital decoder and extensive sound functions. It features controlled high-efficiency propulsion with four powered axles and traction tires. The triple headlights and dual red marker lights on the outer ends of both cars change with the direction of travel and can be controlled digitally. Both units are permanently coupled together using a multiple-conductor coupling. The interior lighting in the class ET 85 powered car and the class ES 85 control car operates in conventional mode and can also be controlled digitally. Maintenance-free warm white LEDs are used for the lighting. The headlights and marker lights on Power Car End 1 and Control Car End 2 can be turned off separately in digital operation, as can the cab lighting on the outer cabs. The construction of the frames and bodies is very detailed, with car bodies and floors made of metal. The interior details are crafted in multiple parts and colors. Brake lines and two close coupler heads are included with this model. The total length over the buffers is approximately 46.8 cm (18-7/16").