Monorail Remodel Recessed Transformer Low Profile 150W or 300W Electronic is a single feed remodel recessed transformer converts standard 120 line-voltage to 12 volts to provide the necessary voltage for powering a monorail low voltage lighting system. It can power lamps totaling up to 150 or 300 watts. Finish available in satin nickel. Dimmable with 600 watt low voltage electronic dimmer. Transformer installs like a remodel recessed downlight and is concealed inside a housing that recesses above the ceiling. 5 inch width x 2.4 inch height.