FG-250RV Smoke Detector - 9V Battery PoweredBRK Model FG-250RV is a single-station smoke alarm specifically designed for RV, residential and institutional applications including sleeping rooms in hospitals, hotels, motels, dormitories, and other multifamily dwellings.Features: Dual Ionization sensing chamber - Generally more effective at detecting small particles produced by flaming fires, such as paper or kitchen grease 85 dB alarm horn at 10 feet 9V battery included Full function test switch Silence feature to silence unwanted nuisance alarms Red LED light that indicates DC power or alarm Tamper-resistant locking pin that locks alarm cover to prevent removal of the battery Approved for RV use but can be used in apartment, dor mitory or hotel applications The compact, low-profile design complements any decor Dimensions: Diameter: (inch) 4.25" Height: (inch) 1.6" Specifications: Fume Type: Smoke Box Dimensions: 2"H x 4"W x 4"L WT: 0.35 lbs UPC: 619749321101 Quick Guide (pdf)Owner&';s Manual (pdf)Brochure (pdf)