WattStopper® Ceiling Mount Occupancy Sensors, 24 VAC, 16 mA, Ultrasonic Sensor, 1000 sq-ft Coverage, 360 deg Viewing, 15 sec to 30 min Delay, LED Lamp, 25 kHz Response, Flying Lead, Automatic On-Off Control Output, Ceiling Mount, 35 deg C, Plastic, White, 4-1/2 in H x 4-1/2 in W x 1-1/4 in D