This document provides information on the RX-40QZ/40PT passive infrared detectors. It summarizes that the detectors use patented Quad Zone Logic and spherical lens design to accurately detect humans while discriminating against other heat sources like animals. The detectors also use Optical Quad Technology with taller detection zones to provide accurate detection in hostile environments. Options include standard Quad Zone Logic detection or models with pet tolerance. Accessories include wall mounts and long range lenses.