95% relative humidity, non-condensing, for indoor use only environmental conditions. This dual technology ceiling sensor combines PIR and ultrasonic technologies into one unit to achieve precise coverage in detecting occupancy. Walk through mode turns lights off 3 min after the area is initially occupied - ideal for brief visits such as mail delivery. Detection signature analysis eliminates false triggers and provides immunity to RFI and EMI. Sensors work with low voltage momentary switches for manual control. LEDs indicate occupancy detection. Eight occupancy logic options provide the ability to customize control to meet application needs. Swivel mounting bracket for convenient corner mounting to wall or ceiling1 A at 24 VAC/VDC load rating.