The new Greengate occupancy sensors are the best performing, broadest featured, most aesthetically pleasing ceiling mounted occupancy sensors available. Greengate ceiling mounted occupancy sensors are ideal for private offices, classrooms, conference rooms, open office areas,hallways and restrooms; increased energy efficiency is desired; or to meet local, state, and federal codes. These sensors utilize passive infrared, ultrasonic, and dual technologies making them ideally suited for a variety of applications. Greengate ceiling mounted occupancy sensors include features such as Automatic and Manual-On Modes, optional built-in daylight sensors and BAS relay, manual adjustments, Zero Time Delay Mode, discrete time delays,Walk-Through Mode, and more. This unit may require the switch Pak SP20-MV.