Our electricians are all completely competent and seasoned and all our get the job done is accompanied by NIC EIC certification. The SBBRKSM easichange® kit replaces the discontinued BRK 660MBX optical and 670MBX ionisation smoke alarms and matches onto your present BRK twist-suit alarm baseplate so there is not any https://www.firesense.co.uk/type/addressable-fire-system/addressable-fire-alarm-control-panels/