Catalog > Consumer Electronics > Security & Alarms > Paradox Alarms Paradox | Garrison Infrared Beam Infrared Beam PDX LK-7HR LK-7HR REFLECTOR BEAM SENSOR {PA2977} - OBSELETE Discontinued Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Features Protection range: 7mReflection type Infrared Beam SensorMount with a standard signal gang electric boxExcellent external light immunityLED alignment indicator-visibly confirms proper alignmentBeam protection for entrances, exits, corridors and staircases