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Amazon.com: Customer reviews: Kidde Fire Sentry Smoke Detector, 9V Battery Powered Smoke Alarm, 4 Inch Compact Design
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Kidde Smoke Detector with Safety Light for Hearing Impaired, Battery Operated Smoke Alarm, Ideal for Hallways or Deaf People - Amazon.com
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Kidde Hardwired Smoke Detector Alarm with Light and Battery Backup, Battery Included, Interconnectable - Commercial Lighted Exit Signs - Amazon.com
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