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Aico EI146e Set of 2 Mains Hard Wired Smoke Alarms with 9V Battery Back Up , White : Amazon.co.uk: DIY & Tools
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Mains Power Hardwired Interlinked AC Smoke Fire Alarm DC 9V Battery Back up En14604 220V Smoke Detector - China 220V Smoke Detector, Dual Power Smoke Alarm | Made-in-China.com
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