The Wattstopper UT-305 UT-305-1 is a 24 VDC ultrasonic ceiling occupancy sensor with a 500 sq ft coverage area, designed for ceiling-mount installation in offices, restrooms, and enclosed commercial spaces. Drawing 30 mA at 24 VDC, it integrates with low-voltage lighting control systems to automate switching based on ultrasonic motion detection, offering reliable occupancy sensing in smaller or partitioned areas.