The last several years, Bachmann has producing some of the best value models available. We like many of the most releases not only for their quality, but also because they have a relatively large space under the shell. This little ALCo S4 features the latest 21 pin LokSound Select DCC decoder, two TDS Mini SuperSonic speakers and a TCS 1622 Motherboard with KeepAlive. Way to go Bachmann!