Redwall-V™ Outdoor PIR detector with advanced detection algorithm. Range: 40m x 4m. Installation height: 2,3 to 4 m. These detectors have anti-rotation and anti-masking functions. Likewise it can detect vandalism attempts or sensor manipulations. These functions improves security during operation. Operating temperature: -25 to +60°C, -40 to +60°C with heating unit.