Carbon monoxide can build up fast in a closed-up camper, and you may not notice it while you sleep. The First Alert CO1-B01RVA is a battery-operated CO alarm listed for both recreational vehicles and home use, so one model covers your rig, your cabin, and your house. An electrochemical sensor monitors the air, and an 85 dB alarm sounds at 10 feet. It runs on a replaceable 9V alkaline battery, so there is no wiring or hookup to deal with. A hinged front cover opens for quick battery changes, and optional tamper resistant locking pins help prevent unwanted battery removal. When the alarm reaches the end of its life, an end-of-life warning tells you it is time to replace it. Backed by a 10-year limited warranty. Note: 9V battery is not included. Features:• Designed for use in recreational vehicles (RVs) or homes• Optional tamper-resistant locking pins help prevent unauthorized battery removal• Hinged front cover allows for convenient battery replacement• End-of-life warning alerts you when the alarm needs to be replaced• Overall Dimensions: 4.3"W x 1.5"D x 4.3"HSpecifications: Model: CO1-B01RVAType: Carbon Monoxide AlarmSensor Type: ElectrochemicalPower Source: Battery OperatedBattery Type: 9V AlkalineBattery Replaceable: YesSound Level: 85dB at 10 feetProduct Height: 4.3 in; 109 mmProduct Length: 1.5 in; 38 mmProduct Width: 4.3 in; 109 mmProduct Weight: 0.32 lb; 0.14 kgFeatures: End-of-Life WarningUPC Number: 194160019177Approvals and Standards: Conforms to CSA 6.19-17Warranty: 10 Years Limited Hinged cover for quick 9V battery changes (not included) Optional locking pins deter battery removal End-of-life warning signals when to replace the alarm | First Alert RV Battery Operated Carbon Monoxide Alarm CO1-B01RVA