Building on the success of their FA-1, Alco lengthened the body of the FA-2 model to provide space for an optional steam generator. This made the new model suitable for both freight and passenger service. Capitalizing on that, we've taken a few liberties in this release and added a few "what if" passenger and freight versions in some of our favorite paint schemes. Of course, you'll find prototypical paint schemes as well including Erie Lackawanna and Louisville and Nashville units complete with Hancock air whistles. All AA sets come with two powered units, both with smoke and lighting and sounds in the lead loco. Powered and Superbass B units will fill your consists with all the power and sounds you could ever want Non-Powered LED lighting Fan driven smoke Legacy/Bluetooth control Superbass RailSounds Non-operating couplers PRODUCT SPECIFICATIONS Rail Line: Pennsylvania Road Number: 5762B Gauge: O Gauge Power: Electric Engine Type: Diesel Min Curve: O31 Dimensions: Length: 13.5" Most Recent Catalog: 2022 C2 WARNING: CHOKING HAZARD - SMALL PARTS! NOT INTENDED FOR CHILDREN UNDER 3.