This set includes two LGB locomotives equipped with MTS decoders; two freight cars; a big oval of track with two switches and station siding track; a powerful 6-amp transformer; an advanced “Type 2” MTS Central Station; a handheld Loco Remote; MTS how-to CD-ROM plus instructions, cables and more. LGB trains are G-scale, which is four times larger than HO-scale trains. The trains are appropriate for outdoor and indoor use. They are made of a high-impact styrene that is UV-resistant and water-resistant when the controllers are covered.