The 21MTC adapter board is suitable if you want to digitize a loco without interface, but do not want to freely wire the decoder.

The adapter board offers a place for decoders with 21MTC interface. This decoder is simply plugged on. On the other side, 21 solder pads allow a clean wiring of your loco. With the help of this adapter board you can make a clean conversion and use the additional functions of the 21MTC interface (e.g. loudspeaker outputs).