besense z-wave plus, pir motion detector- pet immune, easy setup besense pir-zwave is a digital micro-control intrusion detector adopting energy accumulation logical processing& random dynamic time segmentation technology. with precise columnar fresnel lens, pir-zwave can increase its energy receiving efficiency and sensitivity without false alarm. in conjunction with advanced software technology, it will make an accurate judgment between real intruder &interference factors that may cause false alarm. superior ability to detect &prevent false positives.the pulse number is optional, suitable for kinds of residential constructions, preventing false positive&false negative that other ordinary indoor detectors cannot do. its performance is far beyond other ordinary pir alarms. besides, we use large capacity built-in battery & special power saving solution, battery working life is up to 2 years.