Safe-T-Alert Combo Carbon Monoxide Propane Alarm - Flush Mount - Mini - White [25-742-WHT]Combo Carbon Monoxide Propane Alarm Flush Mount Mini White 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: Patented Double Duty Alarm. Upgrades single