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Kidde Firex KF20 Optical Smoke Alarm - Mains Operated with Battery Back Up : Amazon.co.uk: DIY & Tools
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Kidde Part # 21029877 - Kidde Firex Smoke Detector, Hardwired With Battery Backup & Front-Load Battery Door, Smoke Alarm - Smoke Detectors - Home Depot Pro
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Kidde Firex Hardwired Smoke Detector with Photoelectric Sensor and 9-Volt Battery Backup 21029883 - The Home Depot
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Mains Powered 2 Smoke Alarms and 1 Heat Alarm Kit with Alkaline Back-up Battery - Kidde Firex KF Series
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