Occupancy/vacancy sensors use advanced Passive Infrared (PIR) technology to sense the movement of heat-emitting bodies. Occupancy sensors provide Auto-On/Auto-Off or Manual-On/Auto-Off operation while vacancy sensors provide Manual-On/Auto-Off operation only. The sensors automatically turn lights off after a space becomes vacant and a preset time delay elapses. Built-in dimmer provides preset full-range dimming of light load. A horizontal dim/bright bar with row of green LEDs provide intuitive control. Both versions provide 1-pole (single-location) wiring and work with incandescent and magnetic low-voltage lighting load types. All sensors are compatible with any decorator-style or decorator screwless wallplate.