95% relative humidity, non-condensing, for indoor use only environmental conditionsThis dual technology ceiling sensor combines PIR and ultrasonic technologies into one unit to achieve precise coverage in detecting occupancyWalk through mode turns lights off 3 min after the area is initially occupied - ideal for brief visits such as mail deliveryDetection signature analysis eliminates false triggers and provides immunity to RFI and EMISensors work with low voltage momentary switches for manual controlLEDs indicate occupancy detectionEight occupancy logic options provide the ability to customize control to meet application needsSwivel mounting bracket for convenient corner mounting to wall or ceilingWith light level, isolated relay1 A at 24 VAC/VDC load rating