For equipping Märklin/Trix H0 locomotives with integrated high-performance motor or other DC motors. The märklin loco decoder 3 has a soldered wiring harness with an 8-pole NEM interface plug for installation on many locomotives with a corresponding NEM interface and on locomotives with restricted space. The märklin loco 3 decoder supports the digital formats mfx, MM1, MM2 and DCC. Default sound: steam locomotive.