Märklin Märklin 60977 mSD/3 Audio decoder w/o cable, incl. connector

For refitting Märklin/Trix H0 locomotives with built-in high-performance engine or other DC motors. The Märklin sound decoder 3 has a 21-pin port and interface board for retrofitting of analogue and digital locomotives. The Märklin sound decoder 3 supports the digital formats mfx, MM1, MM2 and DCC. Preset sound of a electric locomotive. This text is machine translated.