This decoder is for converting Märklin/Trix H0 locomotives with built-in high-efficiency motors or other DC motors. The märklin mSD SoundDecoder has a wiring harness soldered to it. This wiring harness has an eight-pin NEM connector plug for converting many locomotives with a corresponding NEM connector and locomotives without much space.
The märklin mSD SoundDecoder supports the digital formats mfx, MM 1, MM2, and DCC. The decoder has preset sound for an electric locomotive.