Multi Function Decoder
- Main article: Mobile Decoder
A Multi Function Decoder is a decoder that can control one or more motors and/or accessories. Since these are usually installed in locomotives they are more commonly referred to as Mobile Decoders or locomotive decoders or simply decoders.
Except for very low end decoders, almost all do support multiple functions, the primary function being the locomotive's drive motor and secondary functions being lights, sounds, uncouplers and so on.