The Bosch DS939 motion sensor is designed for reliable performance in a wide range of environmental conditions with a detection range of 21 m. This motion sensor utilizes Passive Infrared (PIR) technology to monitor movement while ensuring energy efficiency. It operates effectively within a temperature range of -40 ��C to 49 ��C making it suitable for various applications. With wired connectivity technology this device facilitates a stable connection for enhanced security measures. Certified by UL and CCC the Bosch DS939 meets stringent safety standards ensuring peace of mind for users.