Ceiling- and Wall-Mount Occupancy Sensors Designed to cover large areas and eliminate obstructions. Automatically turn lights on/off when individuals enter and leave a room to help reduce energy costs. Feature automatic time delay/sensitivity adjustments. For use with incandescent and fluorescent lighting. Low-voltage sensors use 24VDC power supply from control unit (sold separately). Use a maximum of 4 sensors with each control unit. For additional information, see the Tech Specs tab on the product description page.