The First Alert SC07N 2 in 1 Battery Operated Smoke & Carbon Monoxide Alarm is a reliable and essential safety device for any home. With a sleek white design and a diameter of 5 inches, this alarm operates on two batteries for uninterrupted protection. Its dual sensor capabilities detect both smoke and carbon monoxide, ensuring your family is safe from potential dangers. With an operating sound rating of 85 db, this alarm is designed to be heard and heeded in case of emergencies. Made in Mexico by the trusted brand First Alert, this alarm is a must-have for any home security plan.