The OEF-P PIR Fixture Mount High Bay/Low Bay Dimming Occupancy Sensor with Integrated Photocell and Two Interchangeable Lenses provides 1-10V control. The OEF-P is easy to program and set for desired 1-100% continuous dimming levels during daylighting. It is also engineered to meet and exceed all standards requirements of ASHRAE Standard 90.1 2010. Provides robust mechanical latching relay. Relay always returns to close after power loss event. UL listed for electronic ballast loads 120/277V.