Catalog > Consumer Electronics > Security & Alarms > Paradox Alarms Paradox | Garrison Infrared Beam Infrared Beam PDX LK-80HDF LK-80HDF 80M INFRARED 8CH FREQUENCY {PA2915D} Discontinued Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Features Detection range: outdoor 25m, 40m, 60m & 80mWith selectable 8-channel beam frequenciesPowerful and reliable twin beam detectorEasy optical alignment with LED indicationAdjustable beam interruption period (50~700msec)Form C relay providing more applicationsUp to 8-sets for multiple installationTarget yellow color, tuned to the peak wavelength of human vision, to be easily targeted in the beam alignment