WattStopper® Ceiling Mount Occupancy Sensors, 24 VAC, 30 mA, Ultrasonic Sensor, 2200 sq-ft Coverage, 360 deg Viewing, 15 sec to 30 min Delay, LED Lamp, 32 kHz Response, Flying Lead, Automatic On-Off Control Output, Ceiling Mount, 35 deg C, Plastic, White, 4.8 in Dia x 1.5 in D