I have 8 of the microXS units, programmed with various different sounds. As Paul says these fit on the SUZI interface. They are easy to fit if your decoders have a SUZI interface, my Lenz decoders do, Zimo do, not sure about Massoth, LGB don't.
All of mine were programed with an appropriate sound by Mr Peyker.
I recently fitted one of these to a Stainz, and another to a LGB Davenport switcher.
They are easy to program, to move functions around, adjust the volume etc.
If you look at my latest video all of the sounds are by Dietz, except the A-B-A which is native LGB.
Regards
Cliff