Leviton OPB15-DW The Power Base Adapter Converter, Line Voltage Unit, With 15 Amp, 120-277V Load Capacity Converts any Leviton low-voltage ceiling sensor to line-voltage (Patent-Pending) Mounts to standard 2.125" deep x 4" octagon or 2.125" deep x 4" foursquare electrical boxes (foursquare box requires a two-gang mud ring) Simple installation Ideal for retrofit or new construction applications Self-contained transformer and relay Zero crossing circuitry provides increased durability