BRAND NEW AND SEALED DUAL ALARM SMOKE AND CARBON MONOXIDE The First Alert Combination Smoke and Carbon Monoxide Alarm SC05UK is a reliable and essential home security device that provides peace of mind against potential fires and carbon monoxide leaks. This alarm, in a sleek white colour, operates on battery power (not included) and features the trusted First Alert brand and model SC05. With its dual functionality, this alarm ensures safety and protection for you and your family in the event of smoke or carbon monoxide emergencies.