Leviton OSC15-I0W Ceiling Mount Occupancy Sensor, PIR, 360 Degree, 1500 sq. ft. Coverage, Self-Adjusting, White Easy ceiling mount, three wire connection (low voltage) and twist-lock sensor attachment An internal microprocessor continually analyzes, evaluates and adjusts settings All digital circuitry uses a minimum of components A photocell prevents lights from turning on when the room is adequately lit by natural light Leviton offers a wide selection of motion sensors that use passive infrared, ultrasonic or a combined multi-sensing technology