Combo Carbon Monoxide Propane Alarm Surface Mount - Black Have a safe TRIP! Test and inspect the Propane and CO alarms installed in your RV every week and replace malfunctioning alarms. Replace all Propane and CO alarms that are 5 years old or older. Install alarms listed for RV use. Prevent accidents by teaching family and friends about the operation of the alarms. Never ignore a sounding alarm. Features: 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 Manufacturer : Safe-T-Alert Manufacturer Part No : 35-741-BL UPC : 715456357461