Smanos Multi-Beam IR Sensors Security BM-20DescriptionSpecificationsShipping Detects for intruders walking through the invisible infrared beams between the two sensors (T for transmitter, R for receiver); can be up to 6m 20 ft apart Works with the K1 K2 Completely wireless and battery powered Weatherproof design for outdoor use Battery life up to 3 years Ideal for placements on fences, balconies, patios, backyard or pool entries, private entry ways or corridors
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