Crisis Notification: Fire alarm control panels are classified as the central hub for receiving signals from fire detection units for instance smoke detectors and warmth sensors. The SBBRKSM easichange® package replaces the discontinued BRK 660MBX optical and 670MBX ionisation smoke alarms and matches onto your existing BRK twist-fit alarm baseplate https://www.firesense.co.uk/type/addressable-fire-system/addressable-fire-alarm-control-panels/