The American Flyer No. 1 1/2 B Transformer is a vintage AC power supply designed specifically for model railroads and trains. With a voltage of 120V and a power output of 50 watts, this pre-built transformer is ready to go for analog control systems. The classic design and reliable brand reputation of American Flyer make this model a desirable choice for enthusiasts looking to power their No.1 gauge train layouts with a touch of nostalgia.