The PW-301 passive infrared (PIR) wall switch sensor 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. Complies with 2011 NEC requirements. Zero-crossing 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. Selectable audible and/or visual alerts for impending shutoff. LED indicates occupancy detection. In automatic mode, sensor returns automatically to Auto-ON after lights are turned off manually; ideal for presentations. Optional light level sensing with simple setup. Service mode allows sensor to operate as a service switch in the unlikely event of a failure. Sensor coverage tested to NEMA Guide Publication WD 7-2000. Compatible with decorator wall plates.