PIR and iCAMView PRO are linked through RS232 interface, it is usually applied for region protection. PIR is mainly installed in important rooms, on the wall/ceiling, or main passageway. When there’s unexpected invasion, the wireless infrared ray detects object temperature to confirm events, and send the detected signal to iCAMView; At the same time, it’ll trigger alarm, start video recording and active other relevant functions. Features: Operating temperature: -10 ℃ ~ +50 ℃ Detect distance: 0.5 ~3 meters Field of view: 138° x 125°