The DW-100 dual technology wall switch sensor combines the benefits of passive infrared (PIR ) and ultrasonic technologies, and can turn lights OFF and ON based on occupancy. It is characterized by high sensitivity to small and large movements, appealing aesthetics, and a variety of features.FEATURES AND BENEFITS:- Product Environmental Profile- High sensitivity and dense coverage for exceptional performance- Color-matched lens and low profile for appealing design- Selectable operation, walk-through, test and presentation modes for increased energy savings and convenience- Defaults to Manual-ON operation for maximum energy savings- Part of a comprehensive line of PIR, Ultrasonic and Dual Technology wall switch sensors