Full comparison

4 picks · Combination Smoke & Carbon Monoxide Detectors

Product	First Alert First Alert Smoke and Carbon Monoxide Alarm $73	Kidde Kidde Nighthawk Smoke and Carbon Monoxide Alarm $35	USI USI Sensing Plus Smoke and Carbon Monoxide Alarm $65	Universal Security Instruments USI AMI1061SB Sensing Plus Smoke and Fire Detector $29

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