An entire number of annunciators, detectors, handbook phone factors and modules which might be compatible Along with the Morley SMX and STX fire alarm panels The SBBRKSM easichange® package replaces the discontinued BRK 660MBX optical and 670MBX ionisation smoke alarms and fits on to your current BRK twist-suit alarm baseplate https://www.firesense.co.uk/type/addressable-fire-system/addressable-fire-alarm-control-panels/