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Backup Battery Alarm
Door / window detector install on active door/window.1) First clean the installation place, take down the cover of door gap detector,use the screw to fix it, and install well, if do not use screw, can use double-facedglue fixing2) Door/window gap detector A (emitter) installed on fixed door, door window gapdetector B (magnet) should be fixed on active door / window (map2)3) Magnet and emitter should fluctuate face to face and the distance can not exceedthan 10mm
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