Doorway alarm works by using remote controls to established safety code for arming/disarming; house stability program full with completely programmed main unit and sensors, later if you would like Do-it-yourself, please manufacturing facility reset initial according to handbook, then pair them once more or look for operation movie on YouTube https://siambookmark.com/story18585865/how-much-you-need-to-expect-you-ll-pay-for-a-good-conventional-fire-alarm-control-panels