Model: The following applies to both locomotives: mfx+ digital decoders and extensive light and sound functions are included. The locomotives have controlled, high-efficiency propulsion with a flywheel, centrally mounted. 4 axles powered with cardan shafts. Traction tires. The triple headlights and one white marker light (Swiss headlight / marker light code) change over with the direction of travel, will work in conventional operation, and can be controlled digitally. The light code can be switched to a red marker light when the locomotive is running "light". The headlights at Locomotive End 2 and 1 can be turned off separately in digital operation. When the headlights are off at both ends, then the double "A" light function is on as a red emergency stop light. The locomotives' long-distance headlights, cab lighting, and engine room lighting can each be controlled separately in digital operation. Maintenance-free, warm white and red LEDs are used for the lighting. The locomotives have separately applied metal grab irons on the sides and ends. The couplers can be replaced by end skirting included with the locomotive. Length over the buffers 17.1 cm / 6-3/4". Both locomotives are individually packaged and identified. There is also a master package.

Prototype: 2 class Re 421 electric locomotives in different paint schemes. 1 electric locomotive in a TEE paint scheme of crimson/beige with road number 421 393-0 and 1 electric locomotive in a Rheingold paint scheme of cobalt blue / beige with road number 421 387-2. Locomotives privately owned by International Rolling Stock Investment, Inc. (IRSI), operated by TR Trains Rail, Inc. The locomotives look as they did around 2020.