SmartConfigTM Computer system and mobile applications are backward compatible With all the preceding panel firmware Edition U1.05. The SBBRKSM easichange® package replaces the discontinued BRK 660MBX optical and 670MBX ionisation smoke alarms and suits on to your present BRK twist-fit alarm baseplate so there is not any want for just https://www.firesense.co.uk/type/addressable-fire-system/addressable-fire-alarm-control-panels/