Dapol Imperium3 21 Pin 8 Function Decoder (21MTC/NEM 660/MTX interface Standard). Imperium is compatible with all models featuring a standard NEM decoder socket and operates with most motor types.Imperium decoders are compatible with NMRA and MOROP DCC standards.
As the ESU decoder failed in my model train. I needed a new one quickly and I couldn't find any ESU examples. So I bought this one and it has 6 functions on it to allow control of the lights. Not the cheapest on the market but less likely to go BANG without warning.