Left over parts from recently completed job. The Cooper Occ Ceiling Sensor 600sqft OCS-C-P06 is a ceiling sensor manufactured by Cooper Wiring Devices. It is designed to operate on DC current and features a single pole, single throw (SPST) contact form. This ceiling sensor is ideal for detecting occupancy in a 600 square foot space and can be used to control various lighting systems based on the presence of individuals in the area. The Cooper Occ Ceiling Sensor provides a convenient and efficient solution for automating lighting control in residential or commercial settings.