Mercmaster III PCD2 Series Photocontrol, Supply Voltage: 120 V, Frequency Rating: 50/60 HZ, Dimensions: 2.56 IN Length X 1.38 IN Height, Material: Encapsulated With Epoxy Sealing Compound, FS: Aluminum, Standard: Class I, Division 2, Groups A, B, C, D, NEMA 4X, UL Listed: 1604, C/US UL Listed, For Use With FS/FD Box, Mercmaster III - Low Profile, Mercmaster III, And Mercmaster III - 400 Series Luminaires