Door alarm utilizes remote controls to established stability code for arming/disarming; property stability program comprehensive with entirely programmed major device and sensors, later if you wish to Do-it-yourself, be sure to factory reset initial As outlined by handbook, then pair them again or lookup Procedure video clip on YouTube "KERUI https://www.firesense.co.uk/type/conventional-fire-system/conventional-fire-alarm-control-panels/