The American Flyer Train Toy Transformer No. 1A is a vintage black transformer designed for model railroads and trains. This pre-built transformer has a power output of 40 watts at 60 cycles and operates on 120V AC power supply. It features an analog control system and is suitable for both boys and girls who enjoy model train sets. Made of steel, this American Flyer transformer is a classic piece from the United States, ideal for powering and controlling model trains in a nostalgic setting. I got sparks when connecting the two outer most post, but changing the power setting did not seem to change the amount of sparks.