The DSW-100 dual technology wall switch sensor turns lights ON and OFF based on occupancy. It combines the benefits of passive infrared (PIR) and ultrasonic detection technologies, and is characterized by high sensitivity to small and large movements. The DSW-100 replaces existing wall switches and fits behind a standard decorator wall plate.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- Part of a comprehensive line of PIR, Ultrasonic and Dual Technology wall switch sensors