The Wattstopper DW-311-347-W is a commercial 010V dual-technology dimming wall switch sensor rated at 347 VAC that controls occupancy-based switching and continuous dimming of LED drivers and ballasts from an in-wall decorator location. Combining PIR and 40 kHz ultrasonic detection across a 180 sensing pattern, it supports selectable Auto/Manual-ON, high/low dim-level trim, DIP-switch time delays of 5/15/30 minutes, smart light-level control, walk-through mode, and multi-way control from up to four switch locations without a neutral wire. DLC qualified; listed to UL, cUL, UL 924, and RoHS; 5-year warranty. White finish.