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Axis T8331-E is an outdoor-rated passive infrared motion detector for enabling motion-based surveillance to save on bandwidth and storage. There are times with a surveillance camera finds it difficult to detect motion. By using passive infrared (PIR), T8331-E offers professional motion detection in any lighting condition with fewer false alarms. The camera only records what you want it to record. T8331-E is designed for outdoor on an Axis camera using the included tripod thread bracket. It has a maximum range of 15m (50ft).