About 30 on stock. 07496269563..The Lutron Ceiling Sensor Occupancy/Vacancy in white (LRF3-OCR2B-P-WH) is a smart home product designed for monitoring occupancy or vacancy in a room. Made by the reputable brand Lutron in the United States, this sensor uses a 12Au7 type technology to detect changes in the environment. Perfect for automating your smart home setup, this ceiling sensor provides convenience and energy savings by adjusting lighting or heating accordingly based on whether the space is occupied or not. Ideal for enhancing your home's functionality and comfort.