Replacement Smoke Alarm for BRK 660MBX and 670MBX - easichange SBBRKSM | eBay
Mains Powered Ionisation Smoke Alarm - BRK 670MBX
Need replacement smoke alarm. Current model (BRK 670MBX) discontinued. Do I *really* need to replace all (as per alarm manufacturer guidelines)? Can I not just wire up generic alarm to the circuit (
Replacement Smoke Alarm for BRK 660MBX and 670MBX - easichange® SBBRKSM : Amazon.co.uk: DIY & Tools