The PW-302 passive infrared (PIR) wall switch sensor turns lights ON and OFF based on occupancy. It contains two relays for controlling two independent lighting loads or circuits, and a variety of features. Complies with 2011 NEC requirements. Zero-crossing on both relays for long relay life. Vandal resistant lens combines precise coverage with durability. Selectable walk-through mode turns lights off three minutes after the room is initially occupied if no motion is detected after the first 30 seconds. Test mode allows quick and easy adjustments. LED indicates occupancy detection. Selectable audible and/or visual alerts for impending shutoff.