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WattStopper® DW-311-W Multi-Way Wall Switch Occupancy Sensor, 120/277 VAC, Passive Infrared/Ultrasonic Sensor, 35 x 30 ft PIR, 20 x 20 ft Ultrasonic Major Motion, 20 x 15 ft PIR, 15 x 15 ft Ultrasonic Minor Motion Coverage, Wall Mount