Black + Decker Mains Smoke Alarm, 9V Battery Backup, Optical Detector, Interlink Alarms, Fast Fix Installation Base, Test Button, White

BLACK+DECKER Connected Smoke Alarm | 10 Year Sealed Battery | Wirelessly Interlink Alarms | Optical Sensor For Home With Test + Silence Button | Smoke Detector | White | Links Up To 20 Alarms Wirelessly

Wisualarm Smoke Alarm, Interlinked Smoke and Heat Alarm Scotland Bundle, Pre-linked, 10-Year Battery Life,Compliant with Scotland & England Law (2 Smoke + 1 Heat)