FeaturesCombines both ultrasonic (US) motion detection for maximum sensitivity and passive infrared (PIR) motion detection for false triggering immunityThe self-adapting internal microprocessor analyzes the composite sum of both signals to eliminate time-consuming adjustments and callbacks found in non-intelligent sensorsIntelligent, continually adapting sensorUltrasonic (US) combined with passive infrared (PIR) sensing provide high sensitivity, high noise immunity and excellent false tripping immunitySuited for complex environments that are difficult to control with single technology sensorsSnap locks to ceiling mounted cover plateNon-volatile memory, settings saved in protected memory are not lost during power outages500 to 2000 sq-ft coverage when mounted on an 8 to 12 ft ceilingAffords choice of turning lights Off or dimming to a preset level in the unoccupied state when integrated with a Lutron® systemInjection molded plastic