The Monorail 600W Dual Feed Extended Transformer by Edge Lighting Monorail dual feed, 600 watt, 12 volt, extended surface mount magnetic transformer converts 120 volt input to two low-voltage 12 volt output. The decorative surface mount transformer mounts to a standard 4 inch square electrical box with round plaster ring or octagon electrical box (not included). Available in 6, 12, 24, 36, 48 and 96 inch heights. Use with corresponding standoff's. Maximum 2x300 watt loads. Is LED compatible with 12 volt AC LED's. Finish available in satin nickel, polished nickel, or antique bronze. ETL listed.