Safe-T-Alert 45-Series Combo Carbon Monoxide Propane Alarm Surface Mount - Black. These Fire Safety by Safe-T-Alert will help provide early warning for carbon monoxide and propane gas leaks. For reliable performance the Safe-T-Alert 45-Series Combo Carbon Monoxide Propane and Smoke Alarm Surface Mount runs off of a 12-volt power source meaning there are no batteries to deal with. Install these alarms throughout your camper or RV to protect against potentially deadly scenarios. Please only test your smoke and carbon monoxide alarms when you're home. This is especially true if you have young children in the area or if you are sleeping. Specifications for Safe-T-Alert 45-Series Combo Carbon Monoxide Propane Alarm Surface Mount: Manufacturer: Safe-T-Alert Color: Black Features of Safe-T-Alert 45-Series Combo Carbon Monoxide Propane Alarm Surface Mount Double-duty alarm - Detects both gas leaks and CO gas simultaneously Reliable - 12V power means no missing or dead batteries to replace Durable - Built for the extreme RV environment Approved - Meets RVIA/NFPA requirements End of Life Signal Package Contents: Safe-T-Alert 45-Series Combo Carbon Monoxide Propane Alarm Surface Mount Safe-T-Alert 45-741-BL: 45-Series Combo Carbon Monoxide Propane Alarm Surface Mount - Black