4 wire Conv Beam Smoke Detector with 8" Reflector, requires SMK1(Surface Mounting Kit), 5-70 meters protection range,Spacing-9.1 to 18.3m,Single-ended, reflective design,User-friendly alignment procedure,Six user selectable sensitivity levels,Optional integral NFPA 72 sensitivity test feature,Removable plug-in terminal blocks,Digital display for easy alignment,Built-in automatic gain control compensates for signal deterioration from dust build-up,Remote test station option,Paintable cover,Easiest alignment in the industry,Heater kits for transmitter/receiver and reflector option

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