These micro sound decoders are a revolutionary breakthrough for all small scale projects like N, HOe, HOm and TT scales, with all the features of the larger LokSound decoders ( Back-EMF, silent running, 4 functions, etc..). Sized at 28,0mm x 10,0mm x 5.0mm and with a speaker of 16.0mm x 25.0mm x 13.0mm. The wire harness has an NEM651 six-pin interface for most locomotives like Fleischmann, Brawa etc.. or wires can be directly soldered to fit on virtually all locomotives on the market. Micros can be re-programmed with different locomotive sounds over and over again using the Programmer Set.