The Bosch Blue Line Gen2 PIR Motion Detectors use two Fresnel lenses designed to produce sharply focused images throughout the field of view providing superior response to intruders. These lenses provide a high density (77 zone) 7-layer pattern, and the selectable lookdown lens provides an additional three lookdown zones. Easy installation and flexible mounting options provide state-of-the-art detection. The pet-friendly (-WP) generates alarm signals for human intruders without generating false alarm signals for pets.