Wattstopper’s W Series Ultrasonic Ceiling Sensors are versatile motion detectors that control lighting in a wide variety of applications. W Series Sensors can be used individually or as part of an integrated system of Wattstopper lighting control products.FEATURES AND BENEFITS:- Turns lights on and off based on occupancy to reduce energy costs- Adjustable time delay from 15 seconds to 15 minutes- Automatic or manual-on operation when used with a BZ-150 Power Pack- Hallway and 500, 1000 and 2000 square foot coverage available- Ideal for open office areas, conference rooms and restrooms- Advanced Signal Processing (ASP) circuitry automatically adjusts detection threshold