Leviton OSC10-RMW Multi-Technology, Commercial Grade 360 Degree, 1000 Square Foot Coverage, Self-Adjusting, Ceiling Mount Occupancy Sensor, True White Multi-Technology: By using both PIR and U/S signals, the sensor minimizes false triggering for high reliability Self-Adjusting: Internal microprocessor continually analyzes, evaluates and adjusts the infrared sensitivity and time delay - performance is kept at a maximum and user complaints are eliminated Fast, Simple Installation: easy ceiling mount, twist lock sensor attachment for 360-Degree rotation and flexibility Additional mid-range lens assembly included for applications with mounting heights between 12'-20 Uses OSPxx series Power Pack: uses Class 2, 24 volt wiring, three wire connection (low voltage) - multiple sensors can control single or multiple power packs