Photo 1 of **USED** First Alert SMCO100 Battery-Operated Combination Smoke & Carbon Monoxide Alarm, 1-Pack

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Photo 1 of **USED** First Alert SMCO100 Battery-Operated Combination Smoke & Carbon Monoxide Alarm, 1-PackPhoto 2 of **USED** First Alert SMCO100 Battery-Operated Combination Smoke & Carbon Monoxide Alarm, 1-Pack