Wattstopper DT-300 Series Dual Technology Ceiling Sensors 24 VDC/VAC/35 mA/up to 1000 ft2 Product Information:Watt Stoppers low profile DT-300 dual technology occupancy sensor combines the benefits of passive infrared (PIR) and ultrasonic technologies. The sensor mounts on the ceiling with a flat, unobtrusive appearance and provides 360 degrees of coverage. WattStopper Motion Sensor, 360 Degree Dual Tech Ceiling Occupancy Sensor, 24V - White