Catalog > Consumer Electronics > Security & Alarms > Paradox Alarms Paradox | Garrison Infrared Beam Infrared Beam PDX LK-160HQ LK-160HQ GARRISON QUAD BEAM 160M {PA2935} Discontinued Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Features Four beams detection for range 60m, 110m, 160m & 200mSelectable 8-channel beam frequenciesEasy optical alignment with LED indicationUp to 8 sets for multiple installationAdjustable beam interruption period (50-700 msec)Automatic gain control circuitAnti-Frost design