Combo Carbon Monoxide Propane Alarm Surface Mount - BlackHave 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 simultaneouslyReliable - 12V power means no missing or dead batteries to replaceDurable - Built for the extreme RV environmentApproved - Meets RVIA/NFPA requirementsEnd of Life Signal