Truly minimalist design and the industry s smallest 300 watt surface transformer. Constructed of die-cast aluminum and can power lamps totaling up to 300 watts. The transformer is concealed inside a decorative housing and features fast acting secondary short circuit and overload protection that will safely turn the system off should a short occur. Once the short has been removed, the unit can be reset by simply flipping the wall switch off and on. Mounts to a standard 4 inch ceiling junction box with round plaster ring (provided by electrician).