SecurityMan SM80 Wireless PIR Motion Sensor for Air-Alarm1 and Air-AlarmII - White
SM-80 is an add-on wireless PIR motion sensor for SecurityMan Air-Alarm system. Its wireless transmitting distance is up to 450ft (in open area). It includes a 9V alkaline battery which could last up to 2 years. Motion detection range is 100° 10x10m.