Ultrasonic, 180 Degree, 500 Sq. Ft.Coverage, Self-Adjusting, Ceiling Mount Occupancy Sensor. Features: Installed sensor appears almost invisible Easy ceiling mount, three wire connection (low voltage) and twist-lock sensor attachment Accurate, Consistant Switching: Occupant complaints are eliminated; lights are on when room is occupied, off when empty An internal microprocessor continually analyzes, evaluates and adjusts settings All digital circuitry uses a minimum of components Learned and adjusted settings saved in protected memory The photocell prevents lights from turning on when room is adequately lit by natural light Typical Applications: Cafeteria, Computer Room, Office with Cubicles, File Room, Partitioned Restroom, Warehouse Open Area, Work Space General, Workout Facility, Gymnasium, or Hallway