Bachmann you say? Really? Yes, this is one smooth running little ALCo RS-3 and the TCS WOW Diesel just makes it sweeter! We've found these Bachmann ALCo road switchers to be nearly ideal for adding sound due to plenty of room under the shell. The unit can fit two Mini Supersonic speakers & enclosures wired to a WOW Diesel with Keep Alive. The locomotive features great motor control, well rendered details and can pull about 15 cars.