The Leviton Occupancy Sensor Power Base Adapter White converts any Leviton low voltage ceiling occupancy sensor to a selfcontained, line voltage unit. The OPB15DW also has features like: Ideal for retrofit or new construction applications, Zero crossing circuitry provides increased durability, Simple installation and Mounts to standard 2.125 inch deep X 4 inch octagon or 2.125 inch deep X 4 inch foursquare electrical boxes (foursquare box requires a twogang mud ring).Additional Information: Instruction Sheet (PDF)Product Spec Bulletin (PDF)