Bachmann / Soundtraxx "Thomas family" OEM decoder Released in early 2018, is a small decoder that can be included in some of the Thomas series sets, and some of the locos. As of January 2018, it is only available by itself, or it is shown for the Thomas and Percy locos. Interestingly, it has sounds for 7 of the "Thomas family" I'll be checking it out. Here is the manual: Click Here