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GSM alarm use 20m~150m Wall Gate Window Photoelectric Infrared double Beam Detector perimeter protection 2 beam infrared sensor
Galo Intrusion Alarm Infrared Detector Burglar Alarm ABT-100 Photoelectric Dual Beam Perimeter Fence Window Outdoor
6 Beams Fence Perimeter Intrusion Detection Waterproof Active Infrared IR Break Beam Sensors Infrared Fence Detector