FG-250RV Smoke Detector - 9V Battery Powered
BRK 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, dor­mitory or hotel applications
The compact, low-profile design complements any decor
Dimensions: 
Diameter: (inch) 4.25″
Height: (inch) 1.6″