Retrofit for the C-Track three-way switch with electric drive. Digital formats mfx, Motorola, and DCC. Connection via plug contacts, suitable for Märklin and Trix C-Track three-way switches. Address adjustable with a coding switch (Motorola format 1 to 320 / DCC format 1 to 511), alternatively adjustable on the programming track. Switch lantern can be connected and switched (soldering skills required). A digital decoder can be used simultaneously or subsequently for the electric drive of the switches. The decoder is simply connected via plug contacts and can be individually addressed for each switch. The digital power supply can be taken directly from the track power contact of the switch. This way, you get a ready-to-use digital switch that is immediately functional even on mobile setups.