The Wattstopper DW-311-I-U is a 0-10V dual technology wall switch occupancy sensor designed for commercial dimming applications at 120/277V, available in ivory finish. Combining passive infrared (PIR) and ultrasonic detection technologies, it controls 0-10V dimming drivers and ballasts including LED with a PIR sensing range of 35 x 30 ft and selectable Auto/Manual-ON operation for energy code compliance. Certified UL, cUL, UL 924, RoHS, BAA, and DLC qualified; supports multi-way control from up to four switch locations with adjustable time delay, walkthrough mode, and no neutral wire required.