The Laisdcc 4 Function MTC21 Pin DCC Decoder, a highly efficient and versatile digital decoder designed for OO and HO scale model trains. This compact and powerful decoder is equipped with a range of advanced features, including stay alive options, making it an ideal choice for enthusiasts and professionals alike.

The decoder can be easily installed and is compatible with a variety of control systems, including digital DCC and analogue DC. Its 4 function capability allows for seamless control of lights, sound effects, and other accessories, while its MTC 21-pin plug ensures a secure and reliable connection.

One of the standout features of this decoder is its stay alive option, which is designed to keep your train running even when the command station is turned off or the layout is idle. This is achieved through the use of blue and black wires, which attach to the decoder and provide a continuous power supply. With its 30-day warranty and pre-built assembly, this decoder is ready to go straight out of the box, making it an excellent value for model train enthusiasts.

Whether you're a beginner or an experienced model builder, the Laisdcc 4 Function MTC21 Pin DCC Decoder is an excellent choice for anyone looking to add advanced digital control to their model trains.