Photo 1 of Siterlink Hardwired Interconnected Smoke and Carbon Monoxide Detector Combo, 2 in 1 Smoke and CO Detector with 2 AA Batteries Back Up, AC Smoke and CO Alarm, Voice Alert, Self-Check, 6 Pack

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Photo 1 of Siterlink Hardwired Interconnected Smoke and Carbon Monoxide Detector Combo, 2 in 1 Smoke and CO Detector with 2 AA Batteries Back Up, AC Smoke and CO Alarm, Voice Alert, Self-Check, 6 PackPhoto 2 of Siterlink Hardwired Interconnected Smoke and Carbon Monoxide Detector Combo, 2 in 1 Smoke and CO Detector with 2 AA Batteries Back Up, AC Smoke and CO Alarm, Voice Alert, Self-Check, 6 Pack