95% relative humidity, non-condensing, for indoor use only environmental conditionsThis dual technology ceiling sensor combines the benefits of passive infrared (PIR) and ultrasonic technologies to detect occupancySensors have a flat, unobtrusive appearance and provide 360 deg of coverageDetection signature analysis eliminates false triggers and provides immunity to RFI and EMIWalk through mode turns lights off 3 min after the area is initially occupied - ideal for brief visits such as mail deliverySensors work with low voltage momentary switches for manual control1 x 108 operating cyclePatented ultrasonic diffusion technology spreads coverage to a wider areaUses plug terminal wiring system for quick and easy installationEight occupancy logic options provide the ability to customize control to meet application needs1 A at 30 VAC/VDC load rating