Kidde Smoke & Carbon Monoxide Detector with Voice Alerts, Battery Powered, Combination Smoke & CO Alarm

2 units in 1: unit alerts you to smoke & carbon monoxide by sounding a loud, 85-decibel alarm & sounding voice alerts Ionization sensor technology

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Kidde Smoke & Carbon Monoxide Detector with Voice Alerts, Battery

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Kidde Smoke & Carbon Monoxide Detector, Hardwired Interconnect