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X-Sense Wireless Interconnected Smoke Detector Fire Alarm with Over 820 feet Transmission Range, XS01-WR Link+ - Amazon.com
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X-Sense Smoke Detector, Wireless Interconnected Fire Alarm with 10-Year Battery Life and Transmission Range of Over 820 ft, SD20-W, Pack of 6 - Amazon.com
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X-Sense Wireless Interconnected Smoke Detector Battery Powered Fire Alarm with Over 820 feet Transmission Range, XS01-WR Link+, 6-Pack - Amazon.com
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