Transformer:Electronic Transformer, Feed:Single Feed, Finish:Satin Nickel, Wattage:150 Watt Maximum Surface transformers convert standard 120 line voltage to 12 volts to provide the necessary voltage for powering a low-voltage lighting system. The transformer is concealed inside a decorative housing with a single integral power feed. Available for systems totaling 150 or 300 watts. Electronic transformer is dimmable with 600 watt low-voltage electronic dimmer or standard incandescent dimmer. Magnetic transformers are dimmable with 600 watt low-voltage magnetic dimmers, and include an integrated debuzzing dimming coil. Plug-In accessory is available for use on magnetic transformers only. For use with Tiella Rail Systems only. Tiella Rail System and accessories must be purchased separately.Note: For optimal performance remote transformers should be loaded to at least 80 percent of capacity. 12 volt output transformers require the use of 12 volt lamps.