Protect your family, plus get them involved in safety awareness and planning, with this Family 4 Pack from First Alert. It includes 4 SCO5CN combination battery- operated carbon monoxide detector/smoke alarms, plus an activity book, a fire marshal badge, fire truck toy, and more. The alarms feature dual sensors that detect smoke and carbon monoxide in a single device with a loud 85-decibel alarm. A photoelectric sensor detects the smoke and minimizes false alarms, while an advanced electrochemical CO sensor detects carbon monoxide leaks from multiple sources. Install the alarms and then use the kit to discuss your family-safety plan, including what to do if the alarms sound.