Maximize your energy-savings while reducing maintenance costs when you automate the ON/OFF switching of your light fixtures. The Sensor 360 Degree Low-Voltage Ceiling-Mount Extended Range Occupancy and Motion Sensor with Dual Technology incorporate Passive Infrared (PIR) technology and Passive Dual Technology (PDT) into an attractive, economical and programmable sensor that does just that. PDT first sees motion using 100 percent digital Passive Infrared (PIR) detection and then engages Microphones to hear sounds that indicate continued occupancy. This is important for areas like classrooms filled with obstructions like shelving, hanging projects, or lab benches. When mounted at 9 ft., the sensor views extended range of up to 28 ft. Size: large. Color: white.