SA-340 White RV Battery Powered CO2 Detector - RectangleFeatures:. Sealed-In Lithium Battery - No Replacement Needed!. 5-Year Battery. Replaces Battery Powered RV Listed CO Alarms Long 5 Year Battery Life. Easy Installation. Low Battery Indication. Built-In Test/Hush Functions. Approved. Meets RVIA/NFPA requirements. End of Life Signal. Provides audible confirmation when alarm needs to be replaced, with 30 day override (see owner's manual). Replacement date is 60 months (5 years) after pulling battery tab. Conforms To ANSI / UL STD 2034