The PIR Motion Detector is designed to monitor the wide areas by
detecting the persons' activity during day, night and away
times.
When the body heat movement is detected, a RF signal is sent to the
main console to activate the alarm. The effective range of
the
PIR Motion Detector is 40 feet long and with an 100 degree horizontal
angle.
Also, an optional
detection mode (Mode W) can be selected to extend the battery life.