Leviton OSC05-M0W Ceiling Mount Occupancy Sensor, Multi-Technology, 180 Degree, 500 sq. ft. Coverage, Self-Adjusting, White Learned and adjusted settings saved in protected memory Select the approximate area needed, units from 500 to 2000 sq. ft. available Annoying false-offs are minimized and lights on at night is eliminated Callbacks for adjustment are eliminated A photocell prevents lights from turning on when the room is adequately lit by natural light