Wall switch occupancy and Vacancy sensors occupancy sensors have a detection signature processing feature that eliminates false triggers and provides immunity to RFI and EMI. Zero crossing provides long relay life. Optional light level sensing with simple setup. Sensor coverage is tested to NEMA guide publication WD 7 2000. Vacancy sensors replace single pole switches. Feature low profile styling and operate on most common types of residential lighting. Relay based switching with no current leakage to load in off mode for safety. Technical specification item multi way occupancy sensor sensor type passive infrared coverage 1050 sq. Ft. Installation type wall viewing angle 180 degrees timer range 5/10/15/20/25/30 min.