Leviton OSP20-D0 Power Pack for Occupancy Sensor, 20 Amp FL/INC, 120-277VAC 60Hz, 1HP at 120VAC, 2HP at 240VAC, Black,Leviton,OSP20-D0" /> Self-contained transformer & relay Regulated 24 VDC current, 150 mA output Mounts inside or outside junction box, or inside fluorescent ballast cavity Fast Installation Use a Leviton Power Pack with Leviton Occupancy Sensors in the following applications: Bi-level lighting applications, Class Rooms, Conference Rooms, Offices or anywhere optimal lighting and energy savings are desired