The First Alert RV-Approved Battery-Operated Smoke Alarm is specifically designed for use in recreational vehicles, meeting the latest industry standards. It includes a hinged cover for effortless battery replacement, while the tamper-resistant locking pin helps prevent early battery removal. First Alert's Precision Detection advanced sensing technology complies with the latest industry standards to reduce cooking nuisance alarms and provides early warning in the event of a home fire emergency.• Approved for use in recreational vehicles• Tamper resistant locking pin prevents battery removal• Hinged cover makes for easy battery replacements• Battery-operated detector is easy to install and maintain• Test/silence button for efficient testing to ensure alarm is working properly• End-of-life warning lets you know when it's time to replace the detectorSpecs: Model: SMI100RVLevel of Protection: StandardType: Smoke AlarmSensor Type: IonizationSensor Information: Smoke particles of varying number and size are produced in all fires. For maximum protection, use both ionization and photoelectric sensing technologies. Ionization alarms are generally more sensitive to fast flaming fires and photoelectric alarms are generally more sensitive to smoldering fires. Power Source: Battery OperatedBattery Type: 9V AlkalineNumber of Batteries: 1Battery Replaceable: YesSound Level: 85dB at 10 feetReplaces Model: FG250RVProduct Height: 1.6 inProduct Length: 4.25 inProduct Width: 4.25 inProduct Weight: 0.39 lbFeatures: End-of-Life Warning, Precision DetectionUPC Number: 029054022547Warranty: 10 Years Limited Tamper-resistant locking pin Easy battery replacement with hinged cover Test/silence button & end-of-life alert | First Alert RV Approved Battery-Operated Smoke Alarm