Redwall-V™ Outdoor PIR detector with zero angle independent detector (5m x 5m). Range: 30m x 20m. Maximum height installation up to 4m. This sensors has a smart detection system which use environmental setting datas, such as temperature and illumination conditions to adjust automatically the sensitivity. These detectors have anti-rotation and anti-masking functions. Likewise it can detect vandalism attempts or sensor manipulations through an independent alarm output.